20512909392 has 40 divisors (see below), whose sum is σ = 53587105920. Its totient is φ = 6760807680.

The previous prime is 20512909381. The next prime is 20512909411. The reversal of 20512909392 is 29390921502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2396584 + ... + 2405127.

It is an arithmetic number, because the mean of its divisors is an integer number (1339677648).

Almost surely, 2^20512909392 is an apocalyptic number.

It is an amenable number.

20512909392 is an abundant number, since it is smaller than the sum of its proper divisors (33074196528).

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

20512909392 is a wasteful number, since it uses less digits than its factorization.

20512909392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801811 (or 4801805 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The spelling of 20512909392 in words is "twenty billion, five hundred twelve million, nine hundred nine thousand, three hundred ninety-two".