18143622 has 48 divisors (see below), whose sum is σ = 46908720. Its totient is φ = 5183136.

The previous prime is 18143617. The next prime is 18143633. The reversal of 18143622 is 22634181.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 23 ways as a sum of consecutive naturals, for example, 783 + ... + 6074.

It is an arithmetic number, because the mean of its divisors is an integer number (977265).

Almost surely, 2^18143622 is an apocalyptic number.

18143622 is an abundant number, since it is smaller than the sum of its proper divisors (28765098).

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

18143622 is a wasteful number, since it uses less digits than its factorization.

18143622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6882 (or 6869 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 18143622 is about 4259.5330730023. The cubic root of 18143622 is about 262.7693235810.

The spelling of 18143622 in words is "eighteen million, one hundred forty-three thousand, six hundred twenty-two".