18382020 has 24 divisors (see below), whose sum is σ = 51469824. Its totient is φ = 4901856.

The previous prime is 18382019. The next prime is 18382033. The reversal of 18382020 is 2028381.

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, 153124 + ... + 153243.

It is an arithmetic number, because the mean of its divisors is an integer number (2144576).

Almost surely, 2^18382020 is an apocalyptic number.

18382020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18382020 is an abundant number, since it is smaller than the sum of its proper divisors (33087804).

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

18382020 is a wasteful number, since it uses less digits than its factorization.

18382020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306379 (or 306377 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18382020 is about 4287.4258011072. The cubic root of 18382020 is about 263.9152046312.

The spelling of 18382020 in words is "eighteen million, three hundred eighty-two thousand, twenty".