20296560 has 80 divisors (see below), whose sum is σ = 66245760. Its totient is φ = 5126400.

The previous prime is 20296519. The next prime is 20296561. The reversal of 20296560 is 6569202.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20296561) 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 15 ways as a sum of consecutive naturals, for example, 2335 + ... + 6785.

It is an arithmetic number, because the mean of its divisors is an integer number (828072).

Almost surely, 2^20296560 is an apocalyptic number.

20296560 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 20296560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33122880).

20296560 is an abundant number, since it is smaller than the sum of its proper divisors (45949200).

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

20296560 is a wasteful number, since it uses less digits than its factorization.

20296560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486 (or 4480 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20296560 is about 4505.1703630385. The cubic root of 20296560 is about 272.7768305901.

The spelling of 20296560 in words is "twenty million, two hundred ninety-six thousand, five hundred sixty".