20925861896 has 32 divisors (see below), whose sum is σ = 39330845400. Its totient is φ = 10437672960.

The previous prime is 20925861871. The next prime is 20925861919. The reversal of 20925861896 is 69816852902.

It can be written as a sum of positive squares in 4 ways, for example, as 20860024900 + 65836996 = 144430^2 + 8114^2 .

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, 8937686 + ... + 8940026.

Almost surely, 2^20925861896 is an apocalyptic number.

It is an amenable number.

20925861896 is a deficient number, since it is larger than the sum of its proper divisors (18404983504).

20925861896 is a wasteful number, since it uses less digits than its factorization.

20925861896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569 (or 4565 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 20925861896 in words is "twenty billion, nine hundred twenty-five million, eight hundred sixty-one thousand, eight hundred ninety-six".