18250393 has 12 divisors (see below), whose sum is σ = 22348560. Its totient is φ = 14819112.

The previous prime is 18250381. The next prime is 18250399. The reversal of 18250393 is 39305281.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18250393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18250399) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 8871 + ... + 10732.

It is an arithmetic number, because the mean of its divisors is an integer number (1862380).

Almost surely, 2^18250393 is an apocalyptic number.

It is an amenable number.

18250393 is a deficient number, since it is larger than the sum of its proper divisors (4098167).

18250393 is a wasteful number, since it uses less digits than its factorization.

18250393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19636 (or 19629 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 18250393 is about 4272.0478695820. The cubic root of 18250393 is about 263.2837612539.

The spelling of 18250393 in words is "eighteen million, two hundred fifty thousand, three hundred ninety-three".