18862945 has 16 divisors (see below), whose sum is σ = 24077520. Its totient is φ = 14137344.

The previous prime is 18862931. The next prime is 18862951. The reversal of 18862945 is 54926881.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4048144 + 14814801 = 2012^2 + 3849^2 .

It is a cyclic number.

It is not a de Polignac number, because 18862945 - 2⁵ = 18862913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26251 + ... + 26959.

It is an arithmetic number, because the mean of its divisors is an integer number (1504845).

Almost surely, 2^18862945 is an apocalyptic number.

It is an amenable number.

18862945 is a deficient number, since it is larger than the sum of its proper divisors (5214575).

18862945 is a wasteful number, since it uses less digits than its factorization.

18862945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044.

The product of its digits is 138240, while the sum is 43.

The square root of 18862945 is about 4343.1492030553. The cubic root of 18862945 is about 266.1970057708.

The spelling of 18862945 in words is "eighteen million, eight hundred sixty-two thousand, nine hundred forty-five".