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20266597799540 = 2253173344594899
BaseRepresentation
bin1001001101110101011110…
…10111001101011001110100
32122202110122001020221101022
410212322233113031121310
510124021443014041130
6111034202502120312
74161133120644521
oct446725727153164
978673561227338
1020266597799540
11650401a121794
122333976720098
13b40193c33c91
14500ca1174148
152522a9dcb7e5
hex126eaf5cd674

20266597799540 has 48 divisors (see below), whose sum is σ = 43992690470400. Its totient is φ = 7834431680640.

The previous prime is 20266597799491. The next prime is 20266597799561. The reversal of 20266597799540 is 4599779566202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21842990 + ... + 22751909.

It is an arithmetic number, because the mean of its divisors is an integer number (916514384800).

Almost surely, 220266597799540 is an apocalyptic number.

20266597799540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20266597799540 is an abundant number, since it is smaller than the sum of its proper divisors (23726092670860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20266597799540 is a wasteful number, since it uses less digits than its factorization.

20266597799540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44595672 (or 44595670 counting only the distinct ones).

The product of its (nonzero) digits is 514382400, while the sum is 71.

The spelling of 20266597799540 in words is "twenty trillion, two hundred sixty-six billion, five hundred ninety-seven million, seven hundred ninety-nine thousand, five hundred forty".

Divisors: 1 2 4 5 10 20 31 62 124 155 310 620 733 1466 2932 3665 7330 14660 22723 45446 90892 113615 227230 454460 44594899 89189798 178379596 222974495 445948990 891897980 1382441869 2764883738 5529767476 6912209345 13824418690 27648837380 32688060967 65376121934 130752243868 163440304835 326880609670 653761219340 1013329889977 2026659779954 4053319559908 5066649449885 10133298899770 20266597799540