18387002 has 8 divisors (see below), whose sum is σ = 28326036. Its totient is φ = 8944992.

The previous prime is 18387001. The next prime is 18387023. The reversal of 18387002 is 20078381.

It can be written as a sum of positive squares in 2 ways, for example, as 17732521 + 654481 = 4211^2 + 809^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18387001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124163 + ... + 124310.

Almost surely, 2^18387002 is an apocalyptic number.

18387002 is a deficient number, since it is larger than the sum of its proper divisors (9939034).

18387002 is a wasteful number, since it uses less digits than its factorization.

18387002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248512.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 18387002 is about 4288.0067630544. The cubic root of 18387002 is about 263.9390450793.

The spelling of 18387002 in words is "eighteen million, three hundred eighty-seven thousand, two".