18490494 has 24 divisors (see below), whose sum is σ = 40650120. Its totient is φ = 5602960.

The previous prime is 18490489. The next prime is 18490499. The reversal of 18490494 is 49409481.

It is an interprime number because it is at equal distance from previous prime (18490489) and next prime (18490499).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18490499) 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, 12009 + ... + 13460.

It is an arithmetic number, because the mean of its divisors is an integer number (1693755).

Almost surely, 2^18490494 is an apocalyptic number.

18490494 is an abundant number, since it is smaller than the sum of its proper divisors (22159626).

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

18490494 is a wasteful number, since it uses less digits than its factorization.

18490494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25496 (or 25485 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 18490494 is about 4300.0574414768. The cubic root of 18490494 is about 264.4333161656.

The spelling of 18490494 in words is "eighteen million, four hundred ninety thousand, four hundred ninety-four".