20023131320 has 16 divisors (see below), whose sum is σ = 45052045560. Its totient is φ = 8009252512.

The previous prime is 20023131319. The next prime is 20023131341. The reversal of 20023131320 is 2313132002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250289102 + ... + 250289181.

Almost surely, 2^20023131320 is an apocalyptic number.

20023131320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20023131320 is an abundant number, since it is smaller than the sum of its proper divisors (25028914240).

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

20023131320 is a wasteful number, since it uses less digits than its factorization.

20023131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500578294 (or 500578290 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20023131320 its reverse (2313132002), we get a palindrome (22336263322).

The spelling of 20023131320 in words is "twenty billion, twenty-three million, one hundred thirty-one thousand, three hundred twenty".