18103394 has 4 divisors (see below), whose sum is σ = 27155094. Its totient is φ = 9051696.

The previous prime is 18103373. The next prime is 18103433. The reversal of 18103394 is 49330181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17749369 + 354025 = 4213^2 + 595^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4525847 + ... + 4525850.

Almost surely, 2^18103394 is an apocalyptic number.

18103394 is a deficient number, since it is larger than the sum of its proper divisors (9051700).

18103394 is an equidigital number, since it uses as much as digits as its factorization.

18103394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9051699.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 18103394 is about 4254.8083388092. The cubic root of 18103394 is about 262.5749760132.

The spelling of 18103394 in words is "eighteen million, one hundred three thousand, three hundred ninety-four".