23766921 has 24 divisors (see below), whose sum is σ = 36396360. Its totient is φ = 14918400.

The previous prime is 23766887. The next prime is 23766923. The reversal of 23766921 is 12966732.

It can be written as a sum of positive squares in 4 ways, for example, as 1071225 + 22695696 = 1035^2 + 4764^2 .

It is not a de Polignac number, because 23766921 - 2⁶ = 23766857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23766923) 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 23 ways as a sum of consecutive naturals, for example, 9591 + ... + 11811.

It is an arithmetic number, because the mean of its divisors is an integer number (1516515).

Almost surely, 2^23766921 is an apocalyptic number.

It is an amenable number.

23766921 is a deficient number, since it is larger than the sum of its proper divisors (12629439).

23766921 is a wasteful number, since it uses less digits than its factorization.

23766921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297 (or 2294 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 23766921 is about 4875.1329212648. The cubic root of 23766921 is about 287.5131023644.

The spelling of 23766921 in words is "twenty-three million, seven hundred sixty-six thousand, nine hundred twenty-one".