18999274 has 8 divisors (see below), whose sum is σ = 32570208. Its totient is φ = 8142540.

The previous prime is 18999247. The next prime is 18999283. The reversal of 18999274 is 47299981.

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

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, 678532 + ... + 678559.

It is an arithmetic number, because the mean of its divisors is an integer number (4071276).

Almost surely, 2^18999274 is an apocalyptic number.

18999274 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18999274 is a deficient number, since it is larger than the sum of its proper divisors (13570934).

18999274 is a wasteful number, since it uses less digits than its factorization.

18999274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357100.

The product of its digits is 326592, while the sum is 49.

The square root of 18999274 is about 4358.8156648337. The cubic root of 18999274 is about 266.8367661279.

The spelling of 18999274 in words is "eighteen million, nine hundred ninety-nine thousand, two hundred seventy-four".