18358494 has 64 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 4698720.

The previous prime is 18358451. The next prime is 18358507. The reversal of 18358494 is 49485381.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36247 + ... + 36749.

It is an arithmetic number, because the mean of its divisors is an integer number (725760).

Almost surely, 2^18358494 is an apocalyptic number.

18358494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18358494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23224320).

18358494 is an abundant number, since it is smaller than the sum of its proper divisors (28090146).

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

18358494 is a wasteful number, since it uses less digits than its factorization.

18358494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605.

The product of its digits is 138240, while the sum is 42.

The square root of 18358494 is about 4284.6813183713. The cubic root of 18358494 is about 263.8025670326.

The spelling of 18358494 in words is "eighteen million, three hundred fifty-eight thousand, four hundred ninety-four".