20916911936 has 28 divisors (see below), whose sum is σ = 41597880228. Its totient is φ = 10435556352.

The previous prime is 20916911909. The next prime is 20916911947. The reversal of 20916911936 is 63911961902.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18922753600 + 1994158336 = 137560^2 + 44656^2 .

It is a congruent number.

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, 328331 + ... + 386826.

Almost surely, 2^20916911936 is an apocalyptic number.

It is an amenable number.

20916911936 is a deficient number, since it is larger than the sum of its proper divisors (20680968292).

20916911936 is an equidigital number, since it uses as much as digits as its factorization.

20916911936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715626 (or 715616 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 47.

The spelling of 20916911936 in words is "twenty billion, nine hundred sixteen million, nine hundred eleven thousand, nine hundred thirty-six".