18027660 has 48 divisors (see below), whose sum is σ = 57689856. Its totient is φ = 4120512.

The previous prime is 18027643. The next prime is 18027661. The reversal of 18027660 is 6672081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (18027661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21042 + ... + 21881.

It is an arithmetic number, because the mean of its divisors is an integer number (1201872).

Almost surely, 2^18027660 is an apocalyptic number.

18027660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18027660 is an abundant number, since it is smaller than the sum of its proper divisors (39662196).

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

18027660 is a wasteful number, since it uses less digits than its factorization.

18027660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42942 (or 42940 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 18027660 is about 4245.8991980498. The cubic root of 18027660 is about 262.2083109168.

The spelling of 18027660 in words is "eighteen million, twenty-seven thousand, six hundred sixty".