18484920 has 48 divisors (see below), whose sum is σ = 60077160. Its totient is φ = 4929216.

The previous prime is 18484913. The next prime is 18484937. The reversal of 18484920 is 2948481.

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

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 25314 + ... + 26033.

Almost surely, 2^18484920 is an apocalyptic number.

18484920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18484920 is an abundant number, since it is smaller than the sum of its proper divisors (41592240).

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

18484920 is a wasteful number, since it uses less digits than its factorization.

18484920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51364 (or 51357 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18484920 is about 4299.4092617475. The cubic root of 18484920 is about 264.4067421606.

The spelling of 18484920 in words is "eighteen million, four hundred eighty-four thousand, nine hundred twenty".