18113958 has 12 divisors (see below), whose sum is σ = 39246948. Its totient is φ = 6037980.

The previous prime is 18113957. The next prime is 18113971. The reversal of 18113958 is 85931181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18113957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 503148 + ... + 503183.

It is an arithmetic number, because the mean of its divisors is an integer number (3270579).

Almost surely, 2^18113958 is an apocalyptic number.

18113958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18113958 is an abundant number, since it is smaller than the sum of its proper divisors (21132990).

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

18113958 is a wasteful number, since it uses less digits than its factorization.

18113958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006339 (or 1006336 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 18113958 is about 4256.0495767789. The cubic root of 18113958 is about 262.6260401520.

The spelling of 18113958 in words is "eighteen million, one hundred thirteen thousand, nine hundred fifty-eight".