20312442164 has 24 divisors (see below), whose sum is σ = 41453966400. Its totient is φ = 8705331768.

The previous prime is 20312442127. The next prime is 20312442181. The reversal of 20312442164 is 46124421302.

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, 7401122 + ... + 7403865.

It is an arithmetic number, because the mean of its divisors is an integer number (1727248600).

Almost surely, 2^20312442164 is an apocalyptic number.

It is an amenable number.

20312442164 is an abundant number, since it is smaller than the sum of its proper divisors (21141524236).

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

20312442164 is a wasteful number, since it uses less digits than its factorization.

20312442164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14805012 (or 14804996 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 20312442164 its reverse (46124421302), we get a palindrome (66436863466).

The spelling of 20312442164 in words is "twenty billion, three hundred twelve million, four hundred forty-two thousand, one hundred sixty-four".