23131220463 has 30 divisors (see below), whose sum is σ = 37416532824. Its totient is φ = 14234588784.

The previous prime is 23131220443. The next prime is 23131220467. The reversal of 23131220463 is 36402213132.

It is not a de Polignac number, because 23131220463 - 2¹³ = 23131212271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131220467) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 831195 + ... + 858572.

Almost surely, 2^23131220463 is an apocalyptic number.

23131220463 is a deficient number, since it is larger than the sum of its proper divisors (14285312361).

23131220463 is a wasteful number, since it uses less digits than its factorization.

23131220463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689805 (or 1689783 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 23131220463 its reverse (36402213132), we get a palindrome (59533433595).

The spelling of 23131220463 in words is "twenty-three billion, one hundred thirty-one million, two hundred twenty thousand, four hundred sixty-three".