18974798 has 4 divisors (see below), whose sum is σ = 28462200. Its totient is φ = 9487398.

The previous prime is 18974797. The next prime is 18974807. The reversal of 18974798 is 89747981.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4743698 + ... + 4743701.

It is an arithmetic number, because the mean of its divisors is an integer number (7115550).

Almost surely, 2^18974798 is an apocalyptic number.

18974798 is a deficient number, since it is larger than the sum of its proper divisors (9487402).

18974798 is an equidigital number, since it uses as much as digits as its factorization.

18974798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9487401.

The product of its digits is 1016064, while the sum is 53.

The square root of 18974798 is about 4356.0071166149. The cubic root of 18974798 is about 266.7221318655.

The spelling of 18974798 in words is "eighteen million, nine hundred seventy-four thousand, seven hundred ninety-eight".