18409074 has 16 divisors (see below), whose sum is σ = 37674912. Its totient is φ = 5993568.

The previous prime is 18409051. The next prime is 18409109. The reversal of 18409074 is 47090481.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35419 + ... + 35934.

It is an arithmetic number, because the mean of its divisors is an integer number (2354682).

Almost surely, 2^18409074 is an apocalyptic number.

18409074 is an abundant number, since it is smaller than the sum of its proper divisors (19265838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18409074 is a wasteful number, since it uses less digits than its factorization.

18409074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71401.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18409074 is about 4290.5796811154. The cubic root of 18409074 is about 264.0446148198.

The spelling of 18409074 in words is "eighteen million, four hundred nine thousand, seventy-four".