20507031960 has 128 divisors (see below), whose sum is σ = 64983029760. Its totient is φ = 5169024000.

The previous prime is 20507031907. The next prime is 20507031977. The reversal of 20507031960 is 6913070502.

It is a super-2 number, since 2×20507031960² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95860 + ... + 224060.

It is an arithmetic number, because the mean of its divisors is an integer number (507679920).

Almost surely, 2^20507031960 is an apocalyptic number.

20507031960 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 20507031960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32491514880).

20507031960 is an abundant number, since it is smaller than the sum of its proper divisors (44475997800).

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

20507031960 is a wasteful number, since it uses less digits than its factorization.

20507031960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128289 (or 128285 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The spelling of 20507031960 in words is "twenty billion, five hundred seven million, thirty-one thousand, nine hundred sixty".