18372274 has 16 divisors (see below), whose sum is σ = 30122496. Its totient is φ = 8366400.

The previous prime is 18372269. The next prime is 18372281. The reversal of 18372274 is 47227381.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7662 + ... + 9769.

It is an arithmetic number, because the mean of its divisors is an integer number (1882656).

Almost surely, 2^18372274 is an apocalyptic number.

18372274 is a deficient number, since it is larger than the sum of its proper divisors (11750222).

18372274 is a wasteful number, since it uses less digits than its factorization.

18372274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17481.

The product of its digits is 18816, while the sum is 34.

The square root of 18372274 is about 4286.2890709797. The cubic root of 18372274 is about 263.8685544754.

The spelling of 18372274 in words is "eighteen million, three hundred seventy-two thousand, two hundred seventy-four".