18918850 has 24 divisors (see below), whose sum is σ = 35319168. Its totient is φ = 7539600.

The previous prime is 18918829. The next prime is 18918859. The reversal of 18918850 is 5881981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18918859) 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, 17835 + ... + 18865.

It is an arithmetic number, because the mean of its divisors is an integer number (1471632).

Almost surely, 2^18918850 is an apocalyptic number.

18918850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18918850 is a deficient number, since it is larger than the sum of its proper divisors (16400318).

18918850 is a wasteful number, since it uses less digits than its factorization.

18918850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 1405 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 40.

The square root of 18918850 is about 4349.5804395367. The cubic root of 18918850 is about 266.4597266036.

The spelling of 18918850 in words is "eighteen million, nine hundred eighteen thousand, eight hundred fifty".