18998454 has 8 divisors (see below), whose sum is σ = 37996920. Its totient is φ = 6332816.

The previous prime is 18998411. The next prime is 18998471. The reversal of 18998454 is 45489981.

It is a sphenic number, since it is the product of 3 distinct primes.

18998454 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 1583199 + ... + 1583210.

It is an arithmetic number, because the mean of its divisors is an integer number (4749615).

Almost surely, 2^18998454 is an apocalyptic number.

18998454 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18998454 is a wasteful number, since it uses less digits than its factorization.

18998454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166414.

The product of its digits is 414720, while the sum is 48.

The square root of 18998454 is about 4358.7216015708. The cubic root of 18998454 is about 266.8329272216.

The spelling of 18998454 in words is "eighteen million, nine hundred ninety-eight thousand, four hundred fifty-four".