18250140 has 24 divisors (see below), whose sum is σ = 51100560. Its totient is φ = 4866688.

The previous prime is 18250121. The next prime is 18250153. The reversal of 18250140 is 4105281.

It is a super-2 number, since 2×18250140² = 666135220039200, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152025 + ... + 152144.

It is an arithmetic number, because the mean of its divisors is an integer number (2129190).

Almost surely, 2^18250140 is an apocalyptic number.

18250140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18250140 is an abundant number, since it is smaller than the sum of its proper divisors (32850420).

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

18250140 is a wasteful number, since it uses less digits than its factorization.

18250140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304181 (or 304179 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 18250140 is about 4272.0182583879. The cubic root of 18250140 is about 263.2825446390.

The spelling of 18250140 in words is "eighteen million, two hundred fifty thousand, one hundred forty".