20739572916 has 24 divisors (see below), whose sum is σ = 48410263104. Its totient is φ = 6910630080.

The previous prime is 20739572837. The next prime is 20739572921. The reversal of 20739572916 is 61927593702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286225 + ... + 351288.

It is an arithmetic number, because the mean of its divisors is an integer number (2017094296).

Almost surely, 2^20739572916 is an apocalyptic number.

It is an amenable number.

20739572916 is an abundant number, since it is smaller than the sum of its proper divisors (27670690188).

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

20739572916 is a wasteful number, since it uses less digits than its factorization.

20739572916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640231 (or 640229 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 51.

The spelling of 20739572916 in words is "twenty billion, seven hundred thirty-nine million, five hundred seventy-two thousand, nine hundred sixteen".