20312311542534 has 24 divisors (see below), whose sum is σ = 48010918191912. Its totient is φ = 6155245921920.

The previous prime is 20312311542529. The next prime is 20312311542569. The reversal of 20312311542534 is 43524511321302.

20312311542534 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 2 + 3 + 115 + 4 + 2 + 534 = 666.

It is a super-2 number, since 2×20312311542534² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51293715819 + ... + 51293716214.

It is an arithmetic number, because the mean of its divisors is an integer number (2000454924663).

Almost surely, 2^{20312311542534} is an apocalyptic number.

20312311542534 is an abundant number, since it is smaller than the sum of its proper divisors (27698606649378).

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

20312311542534 is a wasteful number, since it uses less digits than its factorization.

20312311542534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102587432052 (or 102587432049 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 20312311542534 its reverse (43524511321302), we get a palindrome (63836822863836).

The spelling of 20312311542534 in words is "twenty trillion, three hundred twelve billion, three hundred eleven million, five hundred forty-two thousand, five hundred thirty-four".