18799020 has 96 divisors (see below), whose sum is σ = 60426240. Its totient is φ = 4847040.

The previous prime is 18799009. The next prime is 18799043. The reversal of 18799020 is 2099781.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 16179 + ... + 17301.

It is an arithmetic number, because the mean of its divisors is an integer number (629440).

Almost surely, 2^18799020 is an apocalyptic number.

18799020 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 18799020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30213120).

18799020 is an abundant number, since it is smaller than the sum of its proper divisors (41627220).

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

18799020 is a wasteful number, since it uses less digits than its factorization.

18799020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 18799020 is about 4335.7836661900. The cubic root of 18799020 is about 265.8959587083.

The spelling of 18799020 in words is "eighteen million, seven hundred ninety-nine thousand, twenty".