18642274 has 8 divisors (see below), whose sum is σ = 31958208. Its totient is φ = 7989540.

The previous prime is 18642269. The next prime is 18642311. The reversal of 18642274 is 47224681.

It is a happy number.

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, 665782 + ... + 665809.

It is an arithmetic number, because the mean of its divisors is an integer number (3994776).

Almost surely, 2^18642274 is an apocalyptic number.

18642274 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18642274 is a deficient number, since it is larger than the sum of its proper divisors (13315934).

18642274 is a wasteful number, since it uses less digits than its factorization.

18642274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331600.

The product of its digits is 21504, while the sum is 34.

The square root of 18642274 is about 4317.6699734926. The cubic root of 18642274 is about 265.1548827592.

The spelling of 18642274 in words is "eighteen million, six hundred forty-two thousand, two hundred seventy-four".