18257412 has 24 divisors (see below), whose sum is σ = 42700000. Its totient is φ = 6071616.

The previous prime is 18257401. The next prime is 18257429. The reversal of 18257412 is 21475281.

It is a super-4 number, since 4×18257412⁴ (a number of 30 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18257412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4464 + ... + 7512.

Almost surely, 2^18257412 is an apocalyptic number.

18257412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18257412 is an abundant number, since it is smaller than the sum of its proper divisors (24442588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18257412 is a wasteful number, since it uses less digits than its factorization.

18257412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555 (or 3553 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 18257412 is about 4272.8692935778. The cubic root of 18257412 is about 263.3175094196.

The spelling of 18257412 in words is "eighteen million, two hundred fifty-seven thousand, four hundred twelve".