18863426 has 4 divisors (see below), whose sum is σ = 28295142. Its totient is φ = 9431712.

The previous prime is 18863413. The next prime is 18863443. The reversal of 18863426 is 62436881.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 14432401 + 4431025 = 3799^2 + 2105^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18863426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4715855 + ... + 4715858.

Almost surely, 2^18863426 is an apocalyptic number.

18863426 is a deficient number, since it is larger than the sum of its proper divisors (9431716).

18863426 is an equidigital number, since it uses as much as digits as its factorization.

18863426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9431715.

The product of its digits is 55296, while the sum is 38.

The square root of 18863426 is about 4343.2045772678. The cubic root of 18863426 is about 266.1992684021.

The spelling of 18863426 in words is "eighteen million, eight hundred sixty-three thousand, four hundred twenty-six".