18040030 has 16 divisors (see below), whose sum is σ = 33592320. Its totient is φ = 6967072.

The previous prime is 18040013. The next prime is 18040039. The reversal of 18040030 is 3004081.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 18039986 and 18040013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18040039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30814 + ... + 31393.

It is an arithmetic number, because the mean of its divisors is an integer number (2099520).

Almost surely, 2^18040030 is an apocalyptic number.

18040030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18040030 is a deficient number, since it is larger than the sum of its proper divisors (15552290).

18040030 is a wasteful number, since it uses less digits than its factorization.

18040030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62243.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 18040030 is about 4247.3556479297. The cubic root of 18040030 is about 262.2682701724.

The spelling of 18040030 in words is "eighteen million, forty thousand, thirty".