18042002 has 16 divisors (see below), whose sum is σ = 30542400. Its totient is φ = 7917840.

The previous prime is 18041987. The next prime is 18042029. The reversal of 18042002 is 20024081.

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, 13502 + ... + 14777.

It is an arithmetic number, because the mean of its divisors is an integer number (1908900).

Almost surely, 2^18042002 is an apocalyptic number.

18042002 is a deficient number, since it is larger than the sum of its proper divisors (12500398).

18042002 is a wasteful number, since it uses less digits than its factorization.

18042002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28321.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 18042002 is about 4247.5877860263. The cubic root of 18042002 is about 262.2778262206.

Adding to 18042002 its reverse (20024081), we get a palindrome (38066083).

The spelling of 18042002 in words is "eighteen million, forty-two thousand, two".