20732160 has 72 divisors (see below), whose sum is σ = 66225600. Its totient is φ = 5527552.

The previous prime is 20732143. The next prime is 20732161. The reversal of 20732160 is 6123702.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20732161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141 + ... + 6539.

It is an arithmetic number, because the mean of its divisors is an integer number (919800).

Almost surely, 2^20732160 is an apocalyptic number.

20732160 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 20732160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33112800).

20732160 is an abundant number, since it is smaller than the sum of its proper divisors (45493440).

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

20732160 is an equidigital number, since it uses as much as digits as its factorization.

20732160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423 (or 5409 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20732160 is about 4553.2581740991. The cubic root of 20732160 is about 274.7144584363.

Adding to 20732160 its reverse (6123702), we get a palindrome (26855862).

The spelling of 20732160 in words is "twenty million, seven hundred thirty-two thousand, one hundred sixty".