18889850 has 48 divisors (see below), whose sum is σ = 41473536. Its totient is φ = 6264000.

The previous prime is 18889841. The next prime is 18889909. The reversal of 18889850 is 5898881.

It is a junction number, because it is equal to n+sod(n) for n = 18889795 and 18889804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9980 + ... + 11720.

It is an arithmetic number, because the mean of its divisors is an integer number (864032).

Almost surely, 2^18889850 is an apocalyptic number.

18889850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18889850 is an abundant number, since it is smaller than the sum of its proper divisors (22583686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18889850 is a wasteful number, since it uses less digits than its factorization.

18889850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791 (or 1786 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 47.

The square root of 18889850 is about 4346.2455061812. The cubic root of 18889850 is about 266.3235082508.

The spelling of 18889850 in words is "eighteen million, eight hundred eighty-nine thousand, eight hundred fifty".