22020520 has 16 divisors (see below), whose sum is σ = 49546260. Its totient is φ = 8808192.

The previous prime is 22020517. The next prime is 22020527. The reversal of 22020520 is 2502022.

It can be written as a sum of positive squares in 2 ways, for example, as 18028516 + 3992004 = 4246^2 + 1998^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22020520.

It is not an unprimeable number, because it can be changed into a prime (22020527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275217 + ... + 275296.

Almost surely, 2^22020520 is an apocalyptic number.

22020520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22020520 is an abundant number, since it is smaller than the sum of its proper divisors (27525740).

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

22020520 is a wasteful number, since it uses less digits than its factorization.

22020520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550524 (or 550520 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 22020520 is about 4692.6026893399. The cubic root of 22020520 is about 280.2910239439.

Adding to 22020520 its reverse (2502022), we get a palindrome (24522542).

The spelling of 22020520 in words is "twenty-two million, twenty thousand, five hundred twenty".