18030040 has 48 divisors (see below), whose sum is σ = 47196000. Its totient is φ = 6181056.

The previous prime is 18029971. The next prime is 18030041. The reversal of 18030040 is 4003081.

It is a junction number, because it is equal to n+sod(n) for n = 18029996 and 18030023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18030041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2640 + ... + 6559.

It is an arithmetic number, because the mean of its divisors is an integer number (983250).

Almost surely, 2^18030040 is an apocalyptic number.

18030040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18030040 is an abundant number, since it is smaller than the sum of its proper divisors (29165960).

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

18030040 is a wasteful number, since it uses less digits than its factorization.

18030040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9224 (or 9213 counting only the distinct ones).

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

The square root of 18030040 is about 4246.1794592316. The cubic root of 18030040 is about 262.2198492662.

The spelling of 18030040 in words is "eighteen million, thirty thousand, forty".