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20999025530560 = 26572112912133461
BaseRepresentation
bin1001100011001001101110…
…11101010001011011000000
32202100111011012020202101001
410301210313131101123000
510223022001013434220
6112354452534221344
74265062266642100
oct461446735213300
982314135222331
1020999025530560
116766700517690
1224319031b4854
13b94279710c2c
145285030c1200
15266375cb080a
hex1319377516c0

20999025530560 has 672 divisors, whose sum is σ = 65717052736320. Its totient is φ = 6312421785600.

The previous prime is 20999025530557. The next prime is 20999025530599. The reversal of 20999025530560 is 6503552099902.

It is a super-2 number, since 2×209990255305602 (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6067327230 + ... + 6067330690.

Almost surely, 220999025530560 is an apocalyptic number.

20999025530560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20999025530560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32858526368160).

20999025530560 is an abundant number, since it is smaller than the sum of its proper divisors (44718027205760).

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

20999025530560 is a wasteful number, since it uses less digits than its factorization.

20999025530560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745 (or 4728 counting only the distinct ones).

The product of its (nonzero) digits is 6561000, while the sum is 55.

The spelling of 20999025530560 in words is "twenty trillion, nine hundred ninety-nine billion, twenty-five million, five hundred thirty thousand, five hundred sixty".