18744880 has 160 divisors (see below), whose sum is σ = 57853440. Its totient is φ = 5468160.

The previous prime is 18744877. The next prime is 18744889. The reversal of 18744880 is 8844781.

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 (18744889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104631 + ... + 104809.

It is an arithmetic number, because the mean of its divisors is an integer number (361584).

Almost surely, 2^18744880 is an apocalyptic number.

18744880 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 18744880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28926720).

18744880 is an abundant number, since it is smaller than the sum of its proper divisors (39108560).

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

18744880 is a wasteful number, since it uses less digits than its factorization.

18744880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 18744880 is about 4329.5357718813. The cubic root of 18744880 is about 265.6404587082.

Subtracting from 18744880 its reverse (8844781), we obtain a palindrome (9900099).

The spelling of 18744880 in words is "eighteen million, seven hundred forty-four thousand, eight hundred eighty".