20332131231 has 16 divisors (see below), whose sum is σ = 27987793920. Its totient is φ = 13115729760.

The previous prime is 20332131227. The next prime is 20332131241. The reversal of 20332131231 is 13213123302.

It is not a de Polignac number, because 20332131231 - 2² = 20332131227 is a prime.

It is a super-2 number, since 2×20332131231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20332131198 and 20332131207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20332131221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1365181 + ... + 1379993.

It is an arithmetic number, because the mean of its divisors is an integer number (1749237120).

Almost surely, 2^20332131231 is an apocalyptic number.

20332131231 is a deficient number, since it is larger than the sum of its proper divisors (7655662689).

20332131231 is a wasteful number, since it uses less digits than its factorization.

20332131231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29606.

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

Adding to 20332131231 its reverse (13213123302), we get a palindrome (33545254533).

The spelling of 20332131231 in words is "twenty billion, three hundred thirty-two million, one hundred thirty-one thousand, two hundred thirty-one".