18079803 has 12 divisors (see below), whose sum is σ = 29846128. Its totient is φ = 10331280.

The previous prime is 18079801. The next prime is 18079829. The reversal of 18079803 is 30897081.

It is not a de Polignac number, because 18079803 - 2¹ = 18079801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18079801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143428 + ... + 143553.

Almost surely, 2^18079803 is an apocalyptic number.

18079803 is a deficient number, since it is larger than the sum of its proper divisors (11766325).

18079803 is a wasteful number, since it uses less digits than its factorization.

18079803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286994 (or 286991 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18079803 is about 4252.0351597794. The cubic root of 18079803 is about 262.4608703579.

The spelling of 18079803 in words is "eighteen million, seventy-nine thousand, eight hundred three".