18895973 has 4 divisors (see below), whose sum is σ = 19063308. Its totient is φ = 18728640.

The previous prime is 18895951. The next prime is 18895979. The reversal of 18895973 is 37959881.

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 4592449 + 14303524 = 2143^2 + 3782^2 .

It is a cyclic number.

It is not a de Polignac number, because 18895973 - 2⁸ = 18895717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18895979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83498 + ... + 83723.

It is an arithmetic number, because the mean of its divisors is an integer number (4765827).

Almost surely, 2^18895973 is an apocalyptic number.

It is an amenable number.

18895973 is a deficient number, since it is larger than the sum of its proper divisors (167335).

18895973 is a wasteful number, since it uses less digits than its factorization.

18895973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167334.

The product of its digits is 544320, while the sum is 50.

The square root of 18895973 is about 4346.9498501823. The cubic root of 18895973 is about 266.3522807165.

The spelling of 18895973 in words is "eighteen million, eight hundred ninety-five thousand, nine hundred seventy-three".