18800940 has 96 divisors (see below), whose sum is σ = 55157760. Its totient is φ = 4781056.

The previous prime is 18800927. The next prime is 18800981. The reversal of 18800940 is 4900881.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 18800898 and 18800907.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166324 + ... + 166436.

It is an arithmetic number, because the mean of its divisors is an integer number (574560).

Almost surely, 2^18800940 is an apocalyptic number.

18800940 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 18800940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27578880).

18800940 is an abundant number, since it is smaller than the sum of its proper divisors (36356820).

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

18800940 is a wasteful number, since it uses less digits than its factorization.

18800940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 18800940 is about 4336.0050737978. The cubic root of 18800940 is about 265.9050106494.

The spelling of 18800940 in words is "eighteen million, eight hundred thousand, nine hundred forty".