20456131304 has 32 divisors (see below), whose sum is σ = 43843753920. Its totient is φ = 8765076096.

The previous prime is 20456131301. The next prime is 20456131313. The reversal of 20456131304 is 40313165402.

It is not an unprimeable number, because it can be changed into a prime (20456131301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250607 + ... + 322049.

It is an arithmetic number, because the mean of its divisors is an integer number (1370117310).

Almost surely, 2^20456131304 is an apocalyptic number.

It is an amenable number.

20456131304 is an abundant number, since it is smaller than the sum of its proper divisors (23387622616).

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

20456131304 is a wasteful number, since it uses less digits than its factorization.

20456131304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76569 (or 76565 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 20456131304 its reverse (40313165402), we get a palindrome (60769296706).

The spelling of 20456131304 in words is "twenty billion, four hundred fifty-six million, one hundred thirty-one thousand, three hundred four".