18979346 has 4 divisors (see below), whose sum is σ = 28469022. Its totient is φ = 9489672.

The previous prime is 18979333. The next prime is 18979349. The reversal of 18979346 is 64397981.

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

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 1297321 = 4205^2 + 1139^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18979346.

It is not an unprimeable number, because it can be changed into a prime (18979349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4744835 + ... + 4744838.

Almost surely, 2^18979346 is an apocalyptic number.

18979346 is a deficient number, since it is larger than the sum of its proper divisors (9489676).

18979346 is an equidigital number, since it uses as much as digits as its factorization.

18979346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9489675.

The product of its digits is 326592, while the sum is 47.

The square root of 18979346 is about 4356.5291230520. The cubic root of 18979346 is about 266.7434400476.

The spelling of 18979346 in words is "eighteen million, nine hundred seventy-nine thousand, three hundred forty-six".