20385960 has 96 divisors (see below), whose sum is σ = 71163360. Its totient is φ = 4658304.

The previous prime is 20385931. The next prime is 20385971. The reversal of 20385960 is 6958302.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4147 + ... + 7613.

It is an arithmetic number, because the mean of its divisors is an integer number (741285).

Almost surely, 2^20385960 is an apocalyptic number.

20385960 is a gapful number since it is divisible by the number (20) 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 20385960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35581680).

20385960 is an abundant number, since it is smaller than the sum of its proper divisors (50777400).

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

20385960 is a wasteful number, since it uses less digits than its factorization.

20385960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495 (or 3484 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20385960 is about 4515.0813946152. The cubic root of 20385960 is about 273.1767428809.

The spelling of 20385960 in words is "twenty million, three hundred eighty-five thousand, nine hundred sixty".