20927964008 has 16 divisors (see below), whose sum is σ = 44845637280. Its totient is φ = 8969127408.

The previous prime is 20927963993. The next prime is 20927964011. The reversal of 20927964008 is 80046972902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186856766 + ... + 186856877.

It is an arithmetic number, because the mean of its divisors is an integer number (2802852330).

Almost surely, 2^20927964008 is an apocalyptic number.

20927964008 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20927964008 is an abundant number, since it is smaller than the sum of its proper divisors (23917673272).

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

20927964008 is a wasteful number, since it uses less digits than its factorization.

20927964008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373713656 (or 373713652 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 20927964008 in words is "twenty billion, nine hundred twenty-seven million, nine hundred sixty-four thousand, eight".