18831480 has 64 divisors (see below), whose sum is σ = 58959360. Its totient is φ = 4802688.

The previous prime is 18831479. The next prime is 18831497. The reversal of 18831480 is 8413881.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652 + ... + 6171.

It is an arithmetic number, because the mean of its divisors is an integer number (921240).

Almost surely, 2^18831480 is an apocalyptic number.

18831480 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 18831480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29479680).

18831480 is an abundant number, since it is smaller than the sum of its proper divisors (40127880).

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

18831480 is a wasteful number, since it uses less digits than its factorization.

18831480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860 (or 6856 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 18831480 is about 4339.5253196634. The cubic root of 18831480 is about 266.0489102969.

The spelling of 18831480 in words is "eighteen million, eight hundred thirty-one thousand, four hundred eighty".