18139002 has 16 divisors (see below), whose sum is σ = 41460672. Its totient is φ = 5182560.

The previous prime is 18138997. The next prime is 18139003. The reversal of 18139002 is 20093181.

It is not an unprimeable number, because it can be changed into a prime (18139003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215899 + ... + 215982.

It is an arithmetic number, because the mean of its divisors is an integer number (2591292).

Almost surely, 2^18139002 is an apocalyptic number.

18139002 is an abundant number, since it is smaller than the sum of its proper divisors (23321670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18139002 is a wasteful number, since it uses less digits than its factorization.

18139002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431893.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 18139002 is about 4258.9907255123. The cubic root of 18139002 is about 262.7470182711.

The spelling of 18139002 in words is "eighteen million, one hundred thirty-nine thousand, two".