18343998 has 24 divisors (see below), whose sum is σ = 39871728. Its totient is φ = 6095232.

The previous prime is 18343943. The next prime is 18344017. The reversal of 18343998 is 89934381.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4911 + ... + 7797.

It is an arithmetic number, because the mean of its divisors is an integer number (1661322).

Almost surely, 2^18343998 is an apocalyptic number.

18343998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18343998 is an abundant number, since it is smaller than the sum of its proper divisors (21527730).

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

18343998 is a wasteful number, since it uses less digits than its factorization.

18343998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248 (or 3245 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 18343998 is about 4282.9893765920. The cubic root of 18343998 is about 263.7331152762.

It can be divided in two parts, 1834 and 3998, that added together give a cube (5832 = 18³).

The spelling of 18343998 in words is "eighteen million, three hundred forty-three thousand, nine hundred ninety-eight".