18622164 has 48 divisors (see below), whose sum is σ = 48093696. Its totient is φ = 5560800.

The previous prime is 18622127. The next prime is 18622171. The reversal of 18622164 is 46122681.

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 15 ways as a sum of consecutive naturals, for example, 8379 + ... + 10365.

It is an arithmetic number, because the mean of its divisors is an integer number (1001952).

Almost surely, 2^18622164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18622164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24046848).

18622164 is an abundant number, since it is smaller than the sum of its proper divisors (29471532).

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

18622164 is a wasteful number, since it uses less digits than its factorization.

18622164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076 (or 2074 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 18622164 is about 4315.3405427614. The cubic root of 18622164 is about 265.0595048526.

The spelling of 18622164 in words is "eighteen million, six hundred twenty-two thousand, one hundred sixty-four".