20315023164 has 36 divisors (see below), whose sum is σ = 51678960424. Its totient is φ = 6728540832.

The previous prime is 20315023163. The next prime is 20315023181. The reversal of 20315023164 is 46132051302.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315023163) 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, 1791502 + ... + 1802805.

Almost surely, 2^20315023164 is an apocalyptic number.

It is an amenable number.

20315023164 is an abundant number, since it is smaller than the sum of its proper divisors (31363937260).

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

20315023164 is a wasteful number, since it uses less digits than its factorization.

20315023164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594474 (or 3594469 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 20315023164 its reverse (46132051302), we get a palindrome (66447074466).

The spelling of 20315023164 in words is "twenty billion, three hundred fifteen million, twenty-three thousand, one hundred sixty-four".