20313131320 has 32 divisors (see below), whose sum is σ = 45905907600. Its totient is φ = 8089454848.

The previous prime is 20313131317. The next prime is 20313131347. The reversal of 20313131320 is 2313131302.

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, 1109485 + ... + 1127644.

Almost surely, 2^20313131320 is an apocalyptic number.

20313131320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20313131320 is an abundant number, since it is smaller than the sum of its proper divisors (25592776280).

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

20313131320 is a wasteful number, since it uses less digits than its factorization.

20313131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237367 (or 2237363 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20313131320 its reverse (2313131302), we get a palindrome (22626262622).

The spelling of 20313131320 in words is "twenty billion, three hundred thirteen million, one hundred thirty-one thousand, three hundred twenty".