20899731692 has 12 divisors (see below), whose sum is σ = 41799463440. Its totient is φ = 8957027856.

The previous prime is 20899731679. The next prime is 20899731707. The reversal of 20899731692 is 29613799802.

20899731692 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373209467 + ... + 373209522.

It is an arithmetic number, because the mean of its divisors is an integer number (3483288620).

Almost surely, 2^20899731692 is an apocalyptic number.

It is an amenable number.

20899731692 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20899731692 is a wasteful number, since it uses less digits than its factorization.

20899731692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746419000 (or 746418998 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 20899731692 in words is "twenty billion, eight hundred ninety-nine million, seven hundred thirty-one thousand, six hundred ninety-two".