20636367656 has 16 divisors (see below), whose sum is σ = 38697056640. Its totient is φ = 10317152560.

The previous prime is 20636367623. The next prime is 20636367667. The reversal of 20636367656 is 65676363602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40280 + ... + 207111.

It is an arithmetic number, because the mean of its divisors is an integer number (2418566040).

Almost surely, 2^20636367656 is an apocalyptic number.

It is an amenable number.

20636367656 is a deficient number, since it is larger than the sum of its proper divisors (18060688984).

20636367656 is a wasteful number, since it uses less digits than its factorization.

20636367656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257824 (or 257820 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 50.

The spelling of 20636367656 in words is "twenty billion, six hundred thirty-six million, three hundred sixty-seven thousand, six hundred fifty-six".