18855803 has 4 divisors (see below), whose sum is σ = 18968880. Its totient is φ = 18742728.

The previous prime is 18855797. The next prime is 18855821. The reversal of 18855803 is 30855881.

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

It is a cyclic number.

It is not a de Polignac number, because 18855803 - 2⁸ = 18855547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18855853) 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, 56288 + ... + 56621.

It is an arithmetic number, because the mean of its divisors is an integer number (4742220).

Almost surely, 2^18855803 is an apocalyptic number.

18855803 is a deficient number, since it is larger than the sum of its proper divisors (113077).

18855803 is a wasteful number, since it uses less digits than its factorization.

18855803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113076.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 18855803 is about 4342.3269107703. The cubic root of 18855803 is about 266.1634051672.

The spelling of 18855803 in words is "eighteen million, eight hundred fifty-five thousand, eight hundred three".