18103642 has 8 divisors (see below), whose sum is σ = 27184500. Its totient is φ = 9042144.

The previous prime is 18103639. The next prime is 18103663. The reversal of 18103642 is 24630181.

It can be written as a sum of positive squares in 2 ways, for example, as 15610401 + 2493241 = 3951^2 + 1579^2 .

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, 2217 + ... + 6412.

Almost surely, 2^18103642 is an apocalyptic number.

18103642 is a deficient number, since it is larger than the sum of its proper divisors (9080858).

18103642 is a wasteful number, since it uses less digits than its factorization.

18103642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9680.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 18103642 is about 4254.8374822078. The cubic root of 18103642 is about 262.5761750203.

The spelling of 18103642 in words is "eighteen million, one hundred three thousand, six hundred forty-two".