20220520 has 16 divisors (see below), whose sum is σ = 45496260. Its totient is φ = 8088192.

The previous prime is 20220517. The next prime is 20220581. The reversal of 20220520 is 2502202.

It can be written as a sum of positive squares in 2 ways, for example, as 17589636 + 2630884 = 4194^2 + 1622^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20220520.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252717 + ... + 252796.

Almost surely, 2^20220520 is an apocalyptic number.

20220520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20220520 is an abundant number, since it is smaller than the sum of its proper divisors (25275740).

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

20220520 is a wasteful number, since it uses less digits than its factorization.

20220520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505524 (or 505520 counting only the distinct ones).

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

The square root of 20220520 is about 4496.7232514354. The cubic root of 20220520 is about 272.4357562550.

Adding to 20220520 its reverse (2502202), we get a palindrome (22722722).

The spelling of 20220520 in words is "twenty million, two hundred twenty thousand, five hundred twenty".