18803385 has 24 divisors (see below), whose sum is σ = 32707584. Its totient is φ = 9993120.

The previous prime is 18803383. The next prime is 18803399. The reversal of 18803385 is 58330881.

It is a happy number.

It is not a de Polignac number, because 18803385 - 2¹ = 18803383 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18803381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16690 + ... + 17780.

It is an arithmetic number, because the mean of its divisors is an integer number (1362816).

Almost surely, 2^18803385 is an apocalyptic number.

18803385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18803385 is a deficient number, since it is larger than the sum of its proper divisors (13904199).

18803385 is a wasteful number, since it uses less digits than its factorization.

18803385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485 (or 1482 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 18803385 is about 4336.2870061840. The cubic root of 18803385 is about 265.9165368385.

The spelling of 18803385 in words is "eighteen million, eight hundred three thousand, three hundred eighty-five".