23910921 has 12 divisors (see below), whose sum is σ = 35273472. Its totient is φ = 15601176.

The previous prime is 23910907. The next prime is 23910923. The reversal of 23910921 is 12901932.

It is not a de Polignac number, because 23910921 - 2⁷ = 23910793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23910923) 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, 27841 + ... + 28686.

It is an arithmetic number, because the mean of its divisors is an integer number (2939456).

Almost surely, 2^23910921 is an apocalyptic number.

It is an amenable number.

23910921 is a deficient number, since it is larger than the sum of its proper divisors (11362551).

23910921 is a wasteful number, since it uses less digits than its factorization.

23910921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56580 (or 56577 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 23910921 is about 4889.8794463668. The cubic root of 23910921 is about 288.0925989856.

The spelling of 23910921 in words is "twenty-three million, nine hundred ten thousand, nine hundred twenty-one".