20927710172 has 12 divisors (see below), whose sum is σ = 36626520000. Its totient is φ = 10462990176.

The previous prime is 20927710171. The next prime is 20927710187. The reversal of 20927710172 is 27101772902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20927710171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160172 + ... + 259827.

It is an arithmetic number, because the mean of its divisors is an integer number (3052210000).

Almost surely, 2^20927710172 is an apocalyptic number.

It is an amenable number.

20927710172 is a deficient number, since it is larger than the sum of its proper divisors (15698809828).

20927710172 is a wasteful number, since it uses less digits than its factorization.

20927710172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432460 (or 432458 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 38.

The spelling of 20927710172 in words is "twenty billion, nine hundred twenty-seven million, seven hundred ten thousand, one hundred seventy-two".