20846317156 has 36 divisors (see below), whose sum is σ = 42473371248. Its totient is φ = 8926509648.

The previous prime is 20846317111. The next prime is 20846317159. The reversal of 20846317156 is 65171364802.

It is not an unprimeable number, because it can be changed into a prime (20846317159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187851 + ... + 277453.

It is an arithmetic number, because the mean of its divisors is an integer number (1179815868).

Almost surely, 2^20846317156 is an apocalyptic number.

It is an amenable number.

20846317156 is an abundant number, since it is smaller than the sum of its proper divisors (21627054092).

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

20846317156 is a wasteful number, since it uses less digits than its factorization.

20846317156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90808 (or 90799 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 20846317156 in words is "twenty billion, eight hundred forty-six million, three hundred seventeen thousand, one hundred fifty-six".