18988480 has 112 divisors (see below), whose sum is σ = 53035200. Its totient is φ = 6472704.

The previous prime is 18988471. The next prime is 18988483. The reversal of 18988480 is 8488981.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 18988480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18988483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109674 + ... + 109846.

Almost surely, 2^18988480 is an apocalyptic number.

18988480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18988480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26517600).

18988480 is an abundant number, since it is smaller than the sum of its proper divisors (34046720).

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

18988480 is an equidigital number, since it uses as much as digits as its factorization.

18988480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 46.

The square root of 18988480 is about 4357.5773085512. The cubic root of 18988480 is about 266.7862241673.

The spelling of 18988480 in words is "eighteen million, nine hundred eighty-eight thousand, four hundred eighty".