20657330156 has 24 divisors (see below), whose sum is σ = 38283023520. Its totient is φ = 9719520512.

The previous prime is 20657330131. The next prime is 20657330167. The reversal of 20657330156 is 65103375602.

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, 470561 + ... + 512583.

It is an arithmetic number, because the mean of its divisors is an integer number (1595125980).

Almost surely, 2^20657330156 is an apocalyptic number.

It is an amenable number.

20657330156 is a deficient number, since it is larger than the sum of its proper divisors (17625693364).

20657330156 is a wasteful number, since it uses less digits than its factorization.

20657330156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49273 (or 49271 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 38.

The spelling of 20657330156 in words is "twenty billion, six hundred fifty-seven million, three hundred thirty thousand, one hundred fifty-six".