18982480 has 120 divisors (see below), whose sum is σ = 50762376. Its totient is φ = 6589440.

The previous prime is 18982477. The next prime is 18982487. The reversal of 18982480 is 8428981.

It can be written as a sum of positive squares in 4 ways, for example, as 7203856 + 11778624 = 2684^2 + 3432^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18982487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358134 + ... + 358186.

Almost surely, 2^18982480 is an apocalyptic number.

18982480 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 18982480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25381188).

18982480 is an abundant number, since it is smaller than the sum of its proper divisors (31779896).

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

18982480 is a wasteful number, since it uses less digits than its factorization.

18982480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 18982480 is about 4356.8887982137. Note that the first 3 decimals coincide. The cubic root of 18982480 is about 266.7581214093.

The spelling of 18982480 in words is "eighteen million, nine hundred eighty-two thousand, four hundred eighty".