20846745831 has 64 divisors (see below), whose sum is σ = 30758330880. Its totient is φ = 12510650880.

The previous prime is 20846745809. The next prime is 20846745851. The reversal of 20846745831 is 13854764802.

It is not a de Polignac number, because 20846745831 - 2⁶ = 20846745767 is a prime.

It is a super-2 number, since 2×20846745831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20846745851) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47057896 + ... + 47058338.

It is an arithmetic number, because the mean of its divisors is an integer number (480598920).

Almost surely, 2^20846745831 is an apocalyptic number.

20846745831 is a deficient number, since it is larger than the sum of its proper divisors (9911585049).

20846745831 is a wasteful number, since it uses less digits than its factorization.

20846745831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 20846745831 in words is "twenty billion, eight hundred forty-six million, seven hundred forty-five thousand, eight hundred thirty-one".