23391499489 has 8 divisors (see below), whose sum is σ = 23444816360. Its totient is φ = 23338233216.

The previous prime is 23391499433. The next prime is 23391499541. The reversal of 23391499489 is 98499419332.

It can be written as a sum of positive squares in 4 ways, for example, as 718668864 + 22672830625 = 26808^2 + 150575^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23391499489 is a prime.

It is a super-2 number, since 2×23391499489² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23391499409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004227 + ... + 1027255.

It is an arithmetic number, because the mean of its divisors is an integer number (2930602045).

Almost surely, 2^23391499489 is an apocalyptic number.

It is an amenable number.

23391499489 is a deficient number, since it is larger than the sum of its proper divisors (53316871).

23391499489 is a wasteful number, since it uses less digits than its factorization.

23391499489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25299.

The product of its digits is 15116544, while the sum is 61.

The spelling of 23391499489 in words is "twenty-three billion, three hundred ninety-one million, four hundred ninety-nine thousand, four hundred eighty-nine".