18320850 has 96 divisors (see below), whose sum is σ = 51871680. Its totient is φ = 4752000.

The previous prime is 18320831. The next prime is 18320851. The reversal of 18320850 is 5802381.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18320851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55185 + ... + 55515.

It is an arithmetic number, because the mean of its divisors is an integer number (540330).

Almost surely, 2^18320850 is an apocalyptic number.

18320850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18320850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25935840).

18320850 is an abundant number, since it is smaller than the sum of its proper divisors (33550830).

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

18320850 is a wasteful number, since it uses less digits than its factorization.

18320850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18320850 is about 4280.2862053839. The cubic root of 18320850 is about 263.6221350372.

The spelling of 18320850 in words is "eighteen million, three hundred twenty thousand, eight hundred fifty".