18699020 has 12 divisors (see below), whose sum is σ = 39267984. Its totient is φ = 7479600.

The previous prime is 18699019. The next prime is 18699041. The reversal of 18699020 is 2099681.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467456 + ... + 467495.

It is an arithmetic number, because the mean of its divisors is an integer number (3272332).

Almost surely, 2^18699020 is an apocalyptic number.

18699020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18699020 is an abundant number, since it is smaller than the sum of its proper divisors (20568964).

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

18699020 is a wasteful number, since it uses less digits than its factorization.

18699020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934960 (or 934958 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 18699020 is about 4324.2363487673. The cubic root of 18699020 is about 265.4236489314.

The spelling of 18699020 in words is "eighteen million, six hundred ninety-nine thousand, twenty".