18805045 has 8 divisors (see below), whose sum is σ = 25789824. Its totient is φ = 12894864.

The previous prime is 18805037. The next prime is 18805049. The reversal of 18805045 is 54050881.

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 18805045 - 2³ = 18805037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18804998 and 18805016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18805049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268609 + ... + 268678.

It is an arithmetic number, because the mean of its divisors is an integer number (3223728).

Almost surely, 2^18805045 is an apocalyptic number.

It is an amenable number.

18805045 is a deficient number, since it is larger than the sum of its proper divisors (6984779).

18805045 is an equidigital number, since it uses as much as digits as its factorization.

18805045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537299.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 18805045 is about 4336.4784099543. The cubic root of 18805045 is about 265.9243618208.

The spelling of 18805045 in words is "eighteen million, eight hundred five thousand, forty-five".