18257030 has 32 divisors (see below), whose sum is σ = 36041760. Its totient is φ = 6603520.

The previous prime is 18257027. The next prime is 18257039. The reversal of 18257030 is 3075281.

It is a super-4 number, since 4×18257030⁴ (a number of 30 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18257039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29282 + ... + 29898.

It is an arithmetic number, because the mean of its divisors is an integer number (1126305).

Almost surely, 2^18257030 is an apocalyptic number.

18257030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18257030 is a deficient number, since it is larger than the sum of its proper divisors (17784730).

18257030 is a wasteful number, since it uses less digits than its factorization.

18257030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 18257030 is about 4272.8245927021. The cubic root of 18257030 is about 263.3156729419.

The spelling of 18257030 in words is "eighteen million, two hundred fifty-seven thousand, thirty".