18030072 has 32 divisors (see below), whose sum is σ = 46126080. Its totient is φ = 5869920.

The previous prime is 18030071. The next prime is 18030073. The reversal of 18030072 is 27003081.

It is an interprime number because it is at equal distance from previous prime (18030071) and next prime (18030073).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18030071) 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, 7704 + ... + 9767.

It is an arithmetic number, because the mean of its divisors is an integer number (1441440).

Almost surely, 2^18030072 is an apocalyptic number.

18030072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18030072 is an abundant number, since it is smaller than the sum of its proper divisors (28096008).

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

18030072 is a wasteful number, since it uses less digits than its factorization.

18030072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17523 (or 17519 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 18030072 is about 4246.1832273231. The cubic root of 18030072 is about 262.2200043967.

The spelling of 18030072 in words is "eighteen million, thirty thousand, seventy-two".