18622645 has 8 divisors (see below), whose sum is σ = 22523904. Its totient is φ = 14780304.

The previous prime is 18622613. The next prime is 18622673. The reversal of 18622645 is 54622681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18622645 - 2⁵ = 18622613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18622645.

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 7 ways as a sum of consecutive naturals, for example, 14029 + ... + 15298.

It is an arithmetic number, because the mean of its divisors is an integer number (2815488).

Almost surely, 2^18622645 is an apocalyptic number.

It is an amenable number.

18622645 is a deficient number, since it is larger than the sum of its proper divisors (3901259).

18622645 is a wasteful number, since it uses less digits than its factorization.

18622645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29459.

The product of its digits is 23040, while the sum is 34.

The square root of 18622645 is about 4315.3962738085. The cubic root of 18622645 is about 265.0617869455.

The spelling of 18622645 in words is "eighteen million, six hundred twenty-two thousand, six hundred forty-five".