18041394 has 32 divisors (see below), whose sum is σ = 42247296. Its totient is φ = 5028480.

The previous prime is 18041383. The next prime is 18041449. The reversal of 18041394 is 49314081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3517 + ... + 6960.

It is an arithmetic number, because the mean of its divisors is an integer number (1320228).

Almost surely, 2^18041394 is an apocalyptic number.

18041394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18041394 is an abundant number, since it is smaller than the sum of its proper divisors (24205902).

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

18041394 is a wasteful number, since it uses less digits than its factorization.

18041394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10530.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18041394 is about 4247.5162153899. The cubic root of 18041394 is about 262.2748800082.

The spelling of 18041394 in words is "eighteen million, forty-one thousand, three hundred ninety-four".