18568945 has 4 divisors (see below), whose sum is σ = 22282740. Its totient is φ = 14855152.

The previous prime is 18568939. The next prime is 18568973. The reversal of 18568945 is 54986581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11262736 + 7306209 = 3356^2 + 2703^2 .

It is a cyclic number.

It is not a de Polignac number, because 18568945 - 2⁷ = 18568817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18568895 and 18568904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856890 + ... + 1856899.

It is an arithmetic number, because the mean of its divisors is an integer number (5570685).

Almost surely, 2^18568945 is an apocalyptic number.

It is an amenable number.

18568945 is a deficient number, since it is larger than the sum of its proper divisors (3713795).

18568945 is an equidigital number, since it uses as much as digits as its factorization.

18568945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713794.

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

The square root of 18568945 is about 4309.1698736532. The cubic root of 18568945 is about 264.8067655026.

It can be divided in two parts, 1856 and 8945, that added together give a palindrome (10801).

The spelling of 18568945 in words is "eighteen million, five hundred sixty-eight thousand, nine hundred forty-five".