23566965 has 16 divisors (see below), whose sum is σ = 38727168. Its totient is φ = 12229056.

The previous prime is 23566957. The next prime is 23566969. The reversal of 23566965 is 56966532.

It is not a de Polignac number, because 23566965 - 2³ = 23566957 is a prime.

It is a super-2 number, since 2×23566965² = 1110803678622450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23566969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20677 + ... + 21786.

It is an arithmetic number, because the mean of its divisors is an integer number (2420448).

Almost surely, 2^23566965 is an apocalyptic number.

It is an amenable number.

23566965 is a deficient number, since it is larger than the sum of its proper divisors (15160203).

23566965 is a wasteful number, since it uses less digits than its factorization.

23566965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42508.

The product of its digits is 291600, while the sum is 42.

The square root of 23566965 is about 4854.5818563497. The cubic root of 23566965 is about 286.7045282304.

It can be divided in two parts, 23566 and 965, that added together give a triangular number (24531 = T₂₂₁).

The spelling of 23566965 in words is "twenty-three million, five hundred sixty-six thousand, nine hundred sixty-five".