20831261704 has 32 divisors (see below), whose sum is σ = 43983901440. Its totient is φ = 9163310400.

The previous prime is 20831261663. The next prime is 20831261719. The reversal of 20831261704 is 40716213802.

It is a self number, because there is not a number n which added to its sum of digits gives 20831261704.

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, 3815319 + ... + 3820774.

It is an arithmetic number, because the mean of its divisors is an integer number (1374496920).

Almost surely, 2^20831261704 is an apocalyptic number.

It is an amenable number.

20831261704 is an abundant number, since it is smaller than the sum of its proper divisors (23152639736).

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

20831261704 is a wasteful number, since it uses less digits than its factorization.

20831261704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7636141 (or 7636137 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 20831261704 in words is "twenty billion, eight hundred thirty-one million, two hundred sixty-one thousand, seven hundred four".