22520316 has 96 divisors (see below), whose sum is σ = 66382848. Its totient is φ = 5783040.

The previous prime is 22520297. The next prime is 22520321. The reversal of 22520316 is 61302522.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 22520292 and 22520301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44521 + ... + 45023.

It is an arithmetic number, because the mean of its divisors is an integer number (691488).

Almost surely, 2^22520316 is an apocalyptic number.

22520316 is a gapful number since it is divisible by the number (26) 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 22520316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33191424).

22520316 is an abundant number, since it is smaller than the sum of its proper divisors (43862532).

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

22520316 is a wasteful number, since it uses less digits than its factorization.

22520316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22520316 is about 4745.5575014955. The cubic root of 22520316 is about 282.3957523831.

Adding to 22520316 its reverse (61302522), we get a palindrome (83822838).

The spelling of 22520316 in words is "twenty-two million, five hundred twenty thousand, three hundred sixteen".