18750257 has 8 divisors (see below), whose sum is σ = 19407360. Its totient is φ = 18096480.

The previous prime is 18750239. The next prime is 18750299. The reversal of 18750257 is 75205781.

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 18750257 - 2⁸ = 18750001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18750757) 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, 17108 + ... + 18170.

It is an arithmetic number, because the mean of its divisors is an integer number (2425920).

Almost surely, 2^18750257 is an apocalyptic number.

It is an amenable number.

18750257 is a deficient number, since it is larger than the sum of its proper divisors (657103).

18750257 is a wasteful number, since it uses less digits than its factorization.

18750257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 18750257 is about 4330.1566946243. The cubic root of 18750257 is about 265.6658560823.

The spelling of 18750257 in words is "eighteen million, seven hundred fifty thousand, two hundred fifty-seven".