18283920 has 160 divisors (see below), whose sum is σ = 61067520. Its totient is φ = 4515840.

The previous prime is 18283913. The next prime is 18283927. The reversal of 18283920 is 2938281.

It is an interprime number because it is at equal distance from previous prime (18283913) and next prime (18283927).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18283927) 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 31 ways as a sum of consecutive naturals, for example, 257485 + ... + 257555.

It is an arithmetic number, because the mean of its divisors is an integer number (381672).

Almost surely, 2^18283920 is an apocalyptic number.

18283920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18283920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30533760).

18283920 is an abundant number, since it is smaller than the sum of its proper divisors (42783600).

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

18283920 is a wasteful number, since it uses less digits than its factorization.

18283920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18283920 is about 4275.9700653770. The cubic root of 18283920 is about 263.4448849965. Note that the first 3 decimals are identical.

The spelling of 18283920 in words is "eighteen million, two hundred eighty-three thousand, nine hundred twenty".