18199020 has 48 divisors (see below), whose sum is σ = 58238208. Its totient is φ = 4159680.

The previous prime is 18198977. The next prime is 18199031. The reversal of 18199020 is 2099181.

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

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, 21246 + ... + 22085.

It is an arithmetic number, because the mean of its divisors is an integer number (1213296).

Almost surely, 2^18199020 is an apocalyptic number.

18199020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18199020 is an abundant number, since it is smaller than the sum of its proper divisors (40039188).

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

18199020 is a wasteful number, since it uses less digits than its factorization.

18199020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43350 (or 43348 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 18199020 is about 4266.0309422225. The cubic root of 18199020 is about 263.0364900913.

The spelling of 18199020 in words is "eighteen million, one hundred ninety-nine thousand, twenty".