20311113534 has 16 divisors (see below), whose sum is σ = 41024428560. Its totient is φ = 6703337600.

The previous prime is 20311113527. The next prime is 20311113569. The reversal of 20311113534 is 43531111302.

It is a congruent number.

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, 16757739 + ... + 16758950.

It is an arithmetic number, because the mean of its divisors is an integer number (2564026785).

Almost surely, 2^20311113534 is an apocalyptic number.

20311113534 is an abundant number, since it is smaller than the sum of its proper divisors (20713315026).

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

20311113534 is a wasteful number, since it uses less digits than its factorization.

20311113534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33516795.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 20311113534 its reverse (43531111302), we get a palindrome (63842224836).

The spelling of 20311113534 in words is "twenty billion, three hundred eleven million, one hundred thirteen thousand, five hundred thirty-four".