23921357 has 4 divisors (see below), whose sum is σ = 24961440. Its totient is φ = 22881276.

The previous prime is 23921341. The next prime is 23921383. The reversal of 23921357 is 75312932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23921357 - 2⁴ = 23921341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23921257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520007 + ... + 520052.

It is an arithmetic number, because the mean of its divisors is an integer number (6240360).

Almost surely, 2^23921357 is an apocalyptic number.

It is an amenable number.

23921357 is a deficient number, since it is larger than the sum of its proper divisors (1040083).

23921357 is a wasteful number, since it uses less digits than its factorization.

23921357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040082.

The product of its digits is 11340, while the sum is 32.

The square root of 23921357 is about 4890.9464319291. The cubic root of 23921357 is about 288.1345058764.

The spelling of 23921357 in words is "twenty-three million, nine hundred twenty-one thousand, three hundred fifty-seven".