18318950 has 24 divisors (see below), whose sum is σ = 36695568. Its totient is φ = 6763680.

The previous prime is 18318947. The next prime is 18318953. The reversal of 18318950 is 5981381.

It is an interprime number because it is at equal distance from previous prime (18318947) and next prime (18318953).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18318950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18318953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13442 + ... + 14741.

It is an arithmetic number, because the mean of its divisors is an integer number (1528982).

Almost surely, 2^18318950 is an apocalyptic number.

18318950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18318950 is an abundant number, since it is smaller than the sum of its proper divisors (18376618).

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

18318950 is a wasteful number, since it uses less digits than its factorization.

18318950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28208 (or 28203 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 18318950 is about 4280.0642518542. The cubic root of 18318950 is about 263.6130215705.

The spelling of 18318950 in words is "eighteen million, three hundred eighteen thousand, nine hundred fifty".