18257275 has 12 divisors (see below), whose sum is σ = 22779792. Its totient is φ = 14515040.

The previous prime is 18257257. The next prime is 18257279. The reversal of 18257275 is 57275281.

It is not a de Polignac number, because 18257275 - 2¹³ = 18249083 is a prime.

It is a super-4 number, since 4×18257275⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18257279) 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, 1989 + ... + 6361.

It is an arithmetic number, because the mean of its divisors is an integer number (1898316).

Almost surely, 2^18257275 is an apocalyptic number.

18257275 is a deficient number, since it is larger than the sum of its proper divisors (4522517).

18257275 is a wasteful number, since it uses less digits than its factorization.

18257275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550 (or 4545 counting only the distinct ones).

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

The square root of 18257275 is about 4272.8532621657. The cubic root of 18257275 is about 263.3168507905.

The spelling of 18257275 in words is "eighteen million, two hundred fifty-seven thousand, two hundred seventy-five".