18041880 has 64 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 4784000.

The previous prime is 18041873. The next prime is 18041911. The reversal of 18041880 is 8814081.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29821 + ... + 30419.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^18041880 is an apocalyptic number.

18041880 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 18041880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27216000).

18041880 is an abundant number, since it is smaller than the sum of its proper divisors (36390120).

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

18041880 is a wasteful number, since it uses less digits than its factorization.

18041880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 18041880 is about 4247.5734249098. The cubic root of 18041880 is about 262.2772350451.

The spelling of 18041880 in words is "eighteen million, forty-one thousand, eight hundred eighty".