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20707417500 = 22354711231559
BaseRepresentation
bin10011010010010000…
…100001110110011100
31222110010122210121220
4103102100201312130
5314402044330000
613302435453340
71332102100410
oct232220416634
958403583556
1020707417500
118866885290
12401aa57250
131c50113283
141006230d40
15812e061a0
hex4d2421d9c

20707417500 has 480 divisors, whose sum is σ = 78598840320. Its totient is φ = 4113120000.

The previous prime is 20707417487. The next prime is 20707417517. The reversal of 20707417500 is 571470702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 13281721 + ... + 13283279.

It is an arithmetic number, because the mean of its divisors is an integer number (163747584).

Almost surely, 220707417500 is an apocalyptic number.

20707417500 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 20707417500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39299420160).

20707417500 is an abundant number, since it is smaller than the sum of its proper divisors (57891422820).

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

20707417500 is a wasteful number, since it uses less digits than its factorization.

20707417500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 33.

The spelling of 20707417500 in words is "twenty billion, seven hundred seven million, four hundred seventeen thousand, five hundred".