18605920 has 48 divisors (see below), whose sum is σ = 44422560. Its totient is φ = 7363584.

The previous prime is 18605897. The next prime is 18605927. The reversal of 18605920 is 2950681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18605927) 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 7 ways as a sum of consecutive naturals, for example, 15916 + ... + 17044.

It is an arithmetic number, because the mean of its divisors is an integer number (925470).

Almost surely, 2^18605920 is an apocalyptic number.

18605920 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 18605920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22211280).

18605920 is an abundant number, since it is smaller than the sum of its proper divisors (25816640).

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

18605920 is a wasteful number, since it uses less digits than its factorization.

18605920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18605920 is about 4313.4580095325. The cubic root of 18605920 is about 264.9824125031.

The spelling of 18605920 in words is "eighteen million, six hundred five thousand, nine hundred twenty".