23204857 has 4 divisors (see below), whose sum is σ = 24989860. Its totient is φ = 21419856.

The previous prime is 23204849. The next prime is 23204873. The reversal of 23204857 is 75840232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14584761 + 8620096 = 3819^2 + 2936^2 .

It is a cyclic number.

It is not a de Polignac number, because 23204857 - 2³ = 23204849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23204837) 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 3 ways as a sum of consecutive naturals, for example, 892482 + ... + 892507.

It is an arithmetic number, because the mean of its divisors is an integer number (6247465).

Almost surely, 2^23204857 is an apocalyptic number.

It is an amenable number.

23204857 is a deficient number, since it is larger than the sum of its proper divisors (1785003).

23204857 is a wasteful number, since it uses less digits than its factorization.

23204857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785002.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 23204857 is about 4817.1419950008. The cubic root of 23204857 is about 285.2285311764.

The spelling of 23204857 in words is "twenty-three million, two hundred four thousand, eight hundred fifty-seven".