23230965981 has 4 divisors (see below), whose sum is σ = 30974621312. Its totient is φ = 15487310652.

The previous prime is 23230965973. The next prime is 23230965983. The reversal of 23230965981 is 18956903232.

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 not a de Polignac number, because 23230965981 - 2³ = 23230965973 is a prime.

It is a super-2 number, since 2×23230965981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23230965981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23230965983) 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, 3871827661 + ... + 3871827666.

It is an arithmetic number, because the mean of its divisors is an integer number (7743655328).

Almost surely, 2^23230965981 is an apocalyptic number.

It is an amenable number.

23230965981 is a deficient number, since it is larger than the sum of its proper divisors (7743655331).

23230965981 is an equidigital number, since it uses as much as digits as its factorization.

23230965981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7743655330.

The product of its (nonzero) digits is 699840, while the sum is 48.

The spelling of 23230965981 in words is "twenty-three billion, two hundred thirty million, nine hundred sixty-five thousand, nine hundred eighty-one".