18479620 has 24 divisors (see below), whose sum is σ = 38945088. Its totient is φ = 7365600.

The previous prime is 18479611. The next prime is 18479651. The reversal of 18479620 is 2697481.

It is a self number, because there is not a number n which added to its sum of digits gives 18479620.

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 7 ways as a sum of consecutive naturals, for example, 4735 + ... + 7705.

It is an arithmetic number, because the mean of its divisors is an integer number (1622712).

Almost surely, 2^18479620 is an apocalyptic number.

18479620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18479620 is an abundant number, since it is smaller than the sum of its proper divisors (20465468).

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

18479620 is a wasteful number, since it uses less digits than its factorization.

18479620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3291 (or 3289 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 18479620 is about 4298.7928538137. The cubic root of 18479620 is about 264.3814694935.

The spelling of 18479620 in words is "eighteen million, four hundred seventy-nine thousand, six hundred twenty".