18752257 has 8 divisors (see below), whose sum is σ = 19340640. Its totient is φ = 18170880.

The previous prime is 18752249. The next prime is 18752267. The reversal of 18752257 is 75225781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18752257 - 2³ = 18752249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18752267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3969 + ... + 7297.

It is an arithmetic number, because the mean of its divisors is an integer number (2417580).

Almost surely, 2^18752257 is an apocalyptic number.

It is an amenable number.

18752257 is a deficient number, since it is larger than the sum of its proper divisors (588383).

18752257 is a wasteful number, since it uses less digits than its factorization.

18752257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503.

The product of its digits is 39200, while the sum is 37.

The square root of 18752257 is about 4330.3876269914. The cubic root of 18752257 is about 265.6753015141.

The spelling of 18752257 in words is "eighteen million, seven hundred fifty-two thousand, two hundred fifty-seven".