20120560 has 40 divisors (see below), whose sum is σ = 47876400. Its totient is φ = 7859712.

The previous prime is 20120543. The next prime is 20120623. The reversal of 20120560 is 6502102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516 + ... + 6364.

It is an arithmetic number, because the mean of its divisors is an integer number (1196910).

Almost surely, 2^20120560 is an apocalyptic number.

20120560 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 20120560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23938200).

20120560 is an abundant number, since it is smaller than the sum of its proper divisors (27755840).

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

20120560 is a wasteful number, since it uses less digits than its factorization.

20120560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5905 (or 5899 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20120560 is about 4485.5947208815. The cubic root of 20120560 is about 271.9860863702.

Adding to 20120560 its reverse (6502102), we get a palindrome (26622662).

The spelling of 20120560 in words is "twenty million, one hundred twenty thousand, five hundred sixty".