23972188489 has 4 divisors (see below), whose sum is σ = 25233882640. Its totient is φ = 22710494340.

The previous prime is 23972188459. The next prime is 23972188523. The reversal of 23972188489 is 98488127932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23972188489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23972188459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630847047 + ... + 630847084.

It is an arithmetic number, because the mean of its divisors is an integer number (6308470660).

Almost surely, 2^23972188489 is an apocalyptic number.

It is an amenable number.

23972188489 is a deficient number, since it is larger than the sum of its proper divisors (1261694151).

23972188489 is a wasteful number, since it uses less digits than its factorization.

23972188489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261694150.

The product of its digits is 13934592, while the sum is 61.

The spelling of 23972188489 in words is "twenty-three billion, nine hundred seventy-two million, one hundred eighty-eight thousand, four hundred eighty-nine".