18620484 has 12 divisors (see below), whose sum is σ = 43447824. Its totient is φ = 6206824.

The previous prime is 18620477. The next prime is 18620489. The reversal of 18620484 is 48402681.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18620489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775842 + ... + 775865.

It is an arithmetic number, because the mean of its divisors is an integer number (3620652).

Almost surely, 2^18620484 is an apocalyptic number.

It is an amenable number.

18620484 is an abundant number, since it is smaller than the sum of its proper divisors (24827340).

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

18620484 is a wasteful number, since it uses less digits than its factorization.

18620484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551714 (or 1551712 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 18620484 is about 4315.1458839766. The cubic root of 18620484 is about 265.0515338249.

The spelling of 18620484 in words is "eighteen million, six hundred twenty thousand, four hundred eighty-four".