18939314 has 8 divisors (see below), whose sum is σ = 29904240. Its totient is φ = 8971236.

The previous prime is 18939299. The next prime is 18939329. The reversal of 18939314 is 41393981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18939299) and next prime (18939329).

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

It is a super-2 number, since 2×18939314² = 717395229581192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 498403 = 18939314 / (1 + 8 + 9 + 3 + 9 + 3 + 1 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249164 + ... + 249239.

It is an arithmetic number, because the mean of its divisors is an integer number (3738030).

Almost surely, 2^18939314 is an apocalyptic number.

18939314 is a deficient number, since it is larger than the sum of its proper divisors (10964926).

18939314 is a wasteful number, since it uses less digits than its factorization.

18939314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498424.

The product of its digits is 23328, while the sum is 38.

The square root of 18939314 is about 4351.9322145456. The cubic root of 18939314 is about 266.5557660381. Note that the first 3 decimals are identical.

The spelling of 18939314 in words is "eighteen million, nine hundred thirty-nine thousand, three hundred fourteen".