23985621 has 12 divisors (see below), whose sum is σ = 37795680. Its totient is φ = 14536680.

The previous prime is 23985617. The next prime is 23985629. The reversal of 23985621 is 12658932.

23985621 is a `hidden beast` number, since 2 + 3 + 98 + 562 + 1 = 666.

It is not a de Polignac number, because 23985621 - 2² = 23985617 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23985629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121041 + ... + 121238.

It is an arithmetic number, because the mean of its divisors is an integer number (3149640).

Almost surely, 2^23985621 is an apocalyptic number.

It is an amenable number.

23985621 is a deficient number, since it is larger than the sum of its proper divisors (13810059).

23985621 is a wasteful number, since it uses less digits than its factorization.

23985621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242296 (or 242293 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 23985621 is about 4897.5117151468. The cubic root of 23985621 is about 288.3922967017.

The spelling of 23985621 in words is "twenty-three million, nine hundred eighty-five thousand, six hundred twenty-one".