23117229990 has 24 divisors (see below), whose sum is σ = 60104798208. Its totient is φ = 6164594640.

The previous prime is 23117229983. The next prime is 23117229997. The reversal of 23117229990 is 9992271132.

It is an interprime number because it is at equal distance from previous prime (23117229983) and next prime (23117229997).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23117229997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128428966 + ... + 128429145.

It is an arithmetic number, because the mean of its divisors is an integer number (2504366592).

Almost surely, 2^23117229990 is an apocalyptic number.

23117229990 is an abundant number, since it is smaller than the sum of its proper divisors (36987568218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23117229990 is a wasteful number, since it uses less digits than its factorization.

23117229990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256858124 (or 256858121 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

It can be divided in two parts, 231172 and 29990, that added together give a palindrome (261162).

The spelling of 23117229990 in words is "twenty-three billion, one hundred seventeen million, two hundred twenty-nine thousand, nine hundred ninety".