18404002 has 8 divisors (see below), whose sum is σ = 28806336. Its totient is φ = 8801892.

The previous prime is 18403999. The next prime is 18404021. The reversal of 18404002 is 20040481.

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, 199998 + ... + 200089.

It is an arithmetic number, because the mean of its divisors is an integer number (3600792).

Almost surely, 2^18404002 is an apocalyptic number.

18404002 is a deficient number, since it is larger than the sum of its proper divisors (10402334).

18404002 is a wasteful number, since it uses less digits than its factorization.

18404002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400112.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 18404002 is about 4289.9885780734. The cubic root of 18404002 is about 264.0203630605.

Adding to 18404002 its reverse (20040481), we get a palindrome (38444483).

The spelling of 18404002 in words is "eighteen million, four hundred four thousand, two".