18039030 has 32 divisors (see below), whose sum is σ = 43892064. Its totient is φ = 4743936.

The previous prime is 18039029. The next prime is 18039067. The reversal of 18039030 is 3093081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1929 + ... + 6308.

It is an arithmetic number, because the mean of its divisors is an integer number (1371627).

Almost surely, 2^18039030 is an apocalyptic number.

18039030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18039030 is an abundant number, since it is smaller than the sum of its proper divisors (25853034).

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

18039030 is a wasteful number, since it uses less digits than its factorization.

18039030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8320.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 18039030 is about 4247.2379259938. The cubic root of 18039030 is about 262.2634240401.

The spelling of 18039030 in words is "eighteen million, thirty-nine thousand, thirty".