18580945 has 8 divisors (see below), whose sum is σ = 22815936. Its totient is φ = 14518896.

The previous prime is 18580943. The next prime is 18580951. The reversal of 18580945 is 54908581.

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 18580945 - 2¹ = 18580943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18580898 and 18580907.

It is not an unprimeable number, because it can be changed into a prime (18580943) 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, 42997 + ... + 43426.

It is an arithmetic number, because the mean of its divisors is an integer number (2851992).

Almost surely, 2^18580945 is an apocalyptic number.

It is an amenable number.

18580945 is a deficient number, since it is larger than the sum of its proper divisors (4234991).

18580945 is an equidigital number, since it uses as much as digits as its factorization.

18580945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86471.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 18580945 is about 4310.5620283207. The cubic root of 18580945 is about 264.8637961509.

The spelling of 18580945 in words is "eighteen million, five hundred eighty thousand, nine hundred forty-five".