20315444164431 has 32 divisors (see below), whose sum is σ = 29749355032320. Its totient is φ = 12255100560384.

The previous prime is 20315444164427. The next prime is 20315444164481. The reversal of 20315444164431 is 13446144451302.

It is not a de Polignac number, because 20315444164431 - 2² = 20315444164427 is a prime.

It is a super-2 number, since 2×20315444164431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315444164481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11693361 + ... + 13317866.

It is an arithmetic number, because the mean of its divisors is an integer number (929667344760).

Almost surely, 2^{20315444164431} is an apocalyptic number.

20315444164431 is a deficient number, since it is larger than the sum of its proper divisors (9433910867889).

20315444164431 is a wasteful number, since it uses less digits than its factorization.

20315444164431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25011655.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 20315444164431 in words is "twenty trillion, three hundred fifteen billion, four hundred forty-four million, one hundred sixty-four thousand, four hundred thirty-one".