18376645 has 16 divisors (see below), whose sum is σ = 26016768. Its totient is φ = 12193920.

The previous prime is 18376639. The next prime is 18376661. The reversal of 18376645 is 54667381.

It is a happy number.

It is not a de Polignac number, because 18376645 - 2¹¹ = 18374597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18376598 and 18376607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7384 + ... + 9553.

It is an arithmetic number, because the mean of its divisors is an integer number (1626048).

Almost surely, 2^18376645 is an apocalyptic number.

It is an amenable number.

18376645 is a deficient number, since it is larger than the sum of its proper divisors (7640123).

18376645 is a wasteful number, since it uses less digits than its factorization.

18376645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16980.

The product of its digits is 120960, while the sum is 40.

The square root of 18376645 is about 4286.7989222729. The cubic root of 18376645 is about 263.8894787224.

The spelling of 18376645 in words is "eighteen million, three hundred seventy-six thousand, six hundred forty-five".