23691966 has 16 divisors (see below), whose sum is σ = 47599104. Its totient is φ = 7861464.

The previous prime is 23691961. The next prime is 23691979. The reversal of 23691966 is 66919632.

It is a super-2 number, since 2×23691966² = 1122618505890312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23691961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7516 + ... + 10191.

It is an arithmetic number, because the mean of its divisors is an integer number (2974944).

Almost surely, 2^23691966 is an apocalyptic number.

23691966 is an abundant number, since it is smaller than the sum of its proper divisors (23907138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23691966 is a wasteful number, since it uses less digits than its factorization.

23691966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17935.

The product of its digits is 104976, while the sum is 42.

The square root of 23691966 is about 4867.4393678812. The cubic root of 23691966 is about 287.2105356248.

The spelling of 23691966 in words is "twenty-three million, six hundred ninety-one thousand, nine hundred sixty-six".