18009274 has 8 divisors (see below), whose sum is σ = 27456948. Its totient is φ = 8856960.

The previous prime is 18009259. The next prime is 18009287. The reversal of 18009274 is 47290081.

It can be written as a sum of positive squares in 2 ways, for example, as 17766225 + 243049 = 4215^2 + 493^2 .

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, 73687 + ... + 73930.

Almost surely, 2^18009274 is an apocalyptic number.

18009274 is a deficient number, since it is larger than the sum of its proper divisors (9447674).

18009274 is a wasteful number, since it uses less digits than its factorization.

18009274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147680.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18009274 is about 4243.7334977588. The cubic root of 18009274 is about 262.1191405001.

The spelling of 18009274 in words is "eighteen million, nine thousand, two hundred seventy-four".