23775681 has 4 divisors (see below), whose sum is σ = 31700912. Its totient is φ = 15850452.

The previous prime is 23775671. The next prime is 23775683. The reversal of 23775681 is 18657732.

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 23775681 - 2⁵ = 23775649 is a prime.

It is a super-2 number, since 2×23775681² = 1130566014027522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23775683) 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, 3962611 + ... + 3962616.

It is an arithmetic number, because the mean of its divisors is an integer number (7925228).

Almost surely, 2^23775681 is an apocalyptic number.

It is an amenable number.

23775681 is a deficient number, since it is larger than the sum of its proper divisors (7925231).

23775681 is an equidigital number, since it uses as much as digits as its factorization.

23775681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7925230.

The product of its digits is 70560, while the sum is 39.

The square root of 23775681 is about 4876.0312755355. The cubic root of 23775681 is about 287.5484218379.

The spelling of 23775681 in words is "twenty-three million, seven hundred seventy-five thousand, six hundred eighty-one".