22809020 has 48 divisors (see below), whose sum is σ = 52999968. Its totient is φ = 8190720.

The previous prime is 22809001. The next prime is 22809023. The reversal of 22809020 is 2090822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22809023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8435 + ... + 10805.

It is an arithmetic number, because the mean of its divisors is an integer number (1104166).

Almost surely, 2^22809020 is an apocalyptic number.

22809020 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 22809020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26499984).

22809020 is an abundant number, since it is smaller than the sum of its proper divisors (30190948).

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

22809020 is a wasteful number, since it uses less digits than its factorization.

22809020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430 (or 2428 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 22809020 is about 4775.8789766911. The cubic root of 22809020 is about 283.5973763105.

Adding to 22809020 its reverse (2090822), we get a palindrome (24899842).

The spelling of 22809020 in words is "twenty-two million, eight hundred nine thousand, twenty".