18986480 has 20 divisors (see below), whose sum is σ = 44143752. Its totient is φ = 7594560.

The previous prime is 18986447. The next prime is 18986483. The reversal of 18986480 is 8468981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18986483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118586 + ... + 118745.

Almost surely, 2^18986480 is an apocalyptic number.

18986480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18986480 is an abundant number, since it is smaller than the sum of its proper divisors (25157272).

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

18986480 is a wasteful number, since it uses less digits than its factorization.

18986480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237344 (or 237338 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 18986480 is about 4357.3478171934. The cubic root of 18986480 is about 266.7768572391.

The spelling of 18986480 in words is "eighteen million, nine hundred eighty-six thousand, four hundred eighty".