18805745 has 8 divisors (see below), whose sum is σ = 25790784. Its totient is φ = 12895344.

The previous prime is 18805741. The next prime is 18805769. The reversal of 18805745 is 54750881.

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

It is not a de Polignac number, because 18805745 - 2² = 18805741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18805699 and 18805708.

It is not an unprimeable number, because it can be changed into a prime (18805741) 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, 268619 + ... + 268688.

It is an arithmetic number, because the mean of its divisors is an integer number (3223848).

Almost surely, 2^18805745 is an apocalyptic number.

It is an amenable number.

18805745 is a deficient number, since it is larger than the sum of its proper divisors (6985039).

18805745 is an equidigital number, since it uses as much as digits as its factorization.

18805745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537319.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 18805745 is about 4336.5591198553. The cubic root of 18805745 is about 265.9276613740.

The spelling of 18805745 in words is "eighteen million, eight hundred five thousand, seven hundred forty-five".