18979338 has 32 divisors (see below), whose sum is σ = 43706880. Its totient is φ = 5382000.

The previous prime is 18979333. The next prime is 18979349. The reversal of 18979338 is 83397981.

Its product of digits (326592) is a multiple of the sum of its prime divisors (3402).

It is not an unprimeable number, because it can be changed into a prime (18979333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4213 + ... + 7463.

It is an arithmetic number, because the mean of its divisors is an integer number (1365840).

Almost surely, 2^18979338 is an apocalyptic number.

18979338 is an abundant number, since it is smaller than the sum of its proper divisors (24727542).

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

18979338 is a wasteful number, since it uses less digits than its factorization.

18979338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3402.

The product of its digits is 326592, while the sum is 48.

The square root of 18979338 is about 4356.5282048898. The cubic root of 18979338 is about 266.7434025692.

The spelling of 18979338 in words is "eighteen million, nine hundred seventy-nine thousand, three hundred thirty-eight".