18896893 has 4 divisors (see below), whose sum is σ = 19548540. Its totient is φ = 18245248.

The previous prime is 18896833. The next prime is 18896897. The reversal of 18896893 is 39869881.

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 10004569 + 8892324 = 3163^2 + 2982^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18896893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18896893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18896897) 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, 325780 + ... + 325837.

It is an arithmetic number, because the mean of its divisors is an integer number (4887135).

Almost surely, 2^18896893 is an apocalyptic number.

It is an amenable number.

18896893 is a deficient number, since it is larger than the sum of its proper divisors (651647).

18896893 is an equidigital number, since it uses as much as digits as its factorization.

18896893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651646.

The product of its digits is 746496, while the sum is 52.

The square root of 18896893 is about 4347.0556702209. The cubic root of 18896893 is about 266.3566033327.

The spelling of 18896893 in words is "eighteen million, eight hundred ninety-six thousand, eight hundred ninety-three".