23420517231 has 16 divisors (see below), whose sum is σ = 31585200480. Its totient is φ = 15434833920.

The previous prime is 23420517227. The next prime is 23420517251. The reversal of 23420517231 is 13271502432.

It is not a de Polignac number, because 23420517231 - 2² = 23420517227 is a prime.

It is a super-2 number, since 2×23420517231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420517251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1919791 + ... + 1931951.

It is an arithmetic number, because the mean of its divisors is an integer number (1974075030).

Almost surely, 2^23420517231 is an apocalyptic number.

23420517231 is a deficient number, since it is larger than the sum of its proper divisors (8164683249).

23420517231 is a wasteful number, since it uses less digits than its factorization.

23420517231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19466.

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 23420517231 in words is "twenty-three billion, four hundred twenty million, five hundred seventeen thousand, two hundred thirty-one".