18670645 has 8 divisors (see below), whose sum is σ = 25605504. Its totient is φ = 12802704.

The previous prime is 18670637. The next prime is 18670661. The reversal of 18670645 is 54607681.

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 18670645 - 2³ = 18670637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266689 + ... + 266758.

It is an arithmetic number, because the mean of its divisors is an integer number (3200688).

Almost surely, 2^18670645 is an apocalyptic number.

It is an amenable number.

18670645 is a deficient number, since it is larger than the sum of its proper divisors (6934859).

18670645 is an equidigital number, since it uses as much as digits as its factorization.

18670645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533459.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 18670645 is about 4320.9541770308. The cubic root of 18670645 is about 265.2893244448.

The spelling of 18670645 in words is "eighteen million, six hundred seventy thousand, six hundred forty-five".