18986120 has 32 divisors (see below), whose sum is σ = 43632000. Its totient is φ = 7432128.

The previous prime is 18986117. The next prime is 18986129. The reversal of 18986120 is 2168981.

It is not an unprimeable number, because it can be changed into a prime (18986129) 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, 3170 + ... + 6929.

It is an arithmetic number, because the mean of its divisors is an integer number (1363500).

Almost surely, 2^18986120 is an apocalyptic number.

18986120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18986120 is an abundant number, since it is smaller than the sum of its proper divisors (24645880).

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

18986120 is a wasteful number, since it uses less digits than its factorization.

18986120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10157 (or 10153 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 18986120 is about 4357.3065074654. The cubic root of 18986120 is about 266.7751711222.

The spelling of 18986120 in words is "eighteen million, nine hundred eighty-six thousand, one hundred twenty".