18013750 has 20 divisors (see below), whose sum is σ = 33767316. Its totient is φ = 7205000.

The previous prime is 18013747. The next prime is 18013763. The reversal of 18013750 is 5731081.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 9 ways as a sum of consecutive naturals, for example, 5956 + ... + 8455.

Almost surely, 2^18013750 is an apocalyptic number.

18013750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18013750 is a deficient number, since it is larger than the sum of its proper divisors (15753566).

18013750 is an equidigital number, since it uses as much as digits as its factorization.

18013750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14433 (or 14418 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 18013750 is about 4244.2608308161. The cubic root of 18013750 is about 262.1408542772.

The spelling of 18013750 in words is "eighteen million, thirteen thousand, seven hundred fifty".