18426803 has 16 divisors (see below), whose sum is σ = 19968000. Its totient is φ = 16964640.

The previous prime is 18426781. The next prime is 18426817. The reversal of 18426803 is 30862481.

It is a cyclic number.

It is not a de Polignac number, because 18426803 - 2²⁰ = 17378227 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 18426803.

It is not an unprimeable number, because it can be changed into a prime (18426883) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 92498 + ... + 92696.

It is an arithmetic number, because the mean of its divisors is an integer number (1248000).

Almost surely, 2^18426803 is an apocalyptic number.

18426803 is a deficient number, since it is larger than the sum of its proper divisors (1541197).

18426803 is a wasteful number, since it uses less digits than its factorization.

18426803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18426803 is about 4292.6452217718. The cubic root of 18426803 is about 264.1293510213.

The spelling of 18426803 in words is "eighteen million, four hundred twenty-six thousand, eight hundred three".