20012133231 has 12 divisors (see below), whose sum is σ = 29100419400. Its totient is φ = 13251881520.

The previous prime is 20012133223. The next prime is 20012133247. The reversal of 20012133231 is 13233121002.

It is not a de Polignac number, because 20012133231 - 2³ = 20012133223 is a prime.

It is a super-2 number, since 2×20012133231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012134231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7460305 + ... + 7462986.

It is an arithmetic number, because the mean of its divisors is an integer number (2425034950).

Almost surely, 2^20012133231 is an apocalyptic number.

20012133231 is a deficient number, since it is larger than the sum of its proper divisors (9088286169).

20012133231 is a wasteful number, since it uses less digits than its factorization.

20012133231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14923446 (or 14923443 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20012133231 its reverse (13233121002), we get a palindrome (33245254233).

The spelling of 20012133231 in words is "twenty billion, twelve million, one hundred thirty-three thousand, two hundred thirty-one".