20312332131 has 64 divisors (see below), whose sum is σ = 34179425280. Its totient is φ = 10443202560.

The previous prime is 20312332129. The next prime is 20312332133. The reversal of 20312332131 is 13123321302.

It is an interprime number because it is at equal distance from previous prime (20312332129) and next prime (20312332133).

It is not a de Polignac number, because 20312332131 - 2¹ = 20312332129 is a prime.

It is a super-2 number, since 2×20312332131² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20312332098 and 20312332107.

It is not an unprimeable number, because it can be changed into a prime (20312332133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6677971 + ... + 6681011.

It is an arithmetic number, because the mean of its divisors is an integer number (534053520).

Almost surely, 2^20312332131 is an apocalyptic number.

20312332131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20312332131 is a deficient number, since it is larger than the sum of its proper divisors (13867093149).

20312332131 is a wasteful number, since it uses less digits than its factorization.

20312332131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20312332131 its reverse (13123321302), we get a palindrome (33435653433).

The spelling of 20312332131 in words is "twenty billion, three hundred twelve million, three hundred thirty-two thousand, one hundred thirty-one".