18586945 has 8 divisors (see below), whose sum is σ = 24020136. Its totient is φ = 13725696.

The previous prime is 18586943. The next prime is 18586957. The reversal of 18586945 is 54968581.

It can be written as a sum of positive squares in 4 ways, for example, as 744769 + 17842176 = 863^2 + 4224^2 .

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 18586945 - 2¹ = 18586943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18586895 and 18586904.

It is not an unprimeable number, because it can be changed into a prime (18586943) 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, 142912 + ... + 143041.

It is an arithmetic number, because the mean of its divisors is an integer number (3002517).

Almost surely, 2^18586945 is an apocalyptic number.

It is an amenable number.

18586945 is a deficient number, since it is larger than the sum of its proper divisors (5433191).

18586945 is a wasteful number, since it uses less digits than its factorization.

18586945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285971.

The product of its digits is 345600, while the sum is 46.

The square root of 18586945 is about 4311.2579370759. The cubic root of 18586945 is about 264.8923022675.

The spelling of 18586945 in words is "eighteen million, five hundred eighty-six thousand, nine hundred forty-five".