23981069681 has 4 divisors (see below), whose sum is σ = 24139884864. Its totient is φ = 23822254500.

The previous prime is 23981069677. The next prime is 23981069687. The reversal of 23981069681 is 18696018932.

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 not a de Polignac number, because 23981069681 - 2² = 23981069677 is a prime.

It is a super-2 number, since 2×23981069681² (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 (23981069687) 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, 79407365 + ... + 79407666.

It is an arithmetic number, because the mean of its divisors is an integer number (6034971216).

Almost surely, 2^23981069681 is an apocalyptic number.

It is an amenable number.

23981069681 is a deficient number, since it is larger than the sum of its proper divisors (158815183).

23981069681 is a wasteful number, since it uses less digits than its factorization.

23981069681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158815182.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 23981069681 in words is "twenty-three billion, nine hundred eighty-one million, sixty-nine thousand, six hundred eighty-one".