18350920 has 32 divisors (see below), whose sum is σ = 47188800. Its totient is φ = 6291648.

The previous prime is 18350909. The next prime is 18350921. The reversal of 18350920 is 2905381.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (18350921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32490 + ... + 33049.

It is an arithmetic number, because the mean of its divisors is an integer number (1474650).

Almost surely, 2^18350920 is an apocalyptic number.

18350920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18350920 is an abundant number, since it is smaller than the sum of its proper divisors (28837880).

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

18350920 is a wasteful number, since it uses less digits than its factorization.

18350920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65557 (or 65553 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 18350920 is about 4283.7973808293. The cubic root of 18350920 is about 263.7662838190.

The spelling of 18350920 in words is "eighteen million, three hundred fifty thousand, nine hundred twenty".