22127820 has 96 divisors (see below), whose sum is σ = 72817920. Its totient is φ = 4949760.

The previous prime is 22127797. The next prime is 22127849. The reversal of 22127820 is 2872122.

It is a happy 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 31 ways as a sum of consecutive naturals, for example, 7291 + ... + 9869.

It is an arithmetic number, because the mean of its divisors is an integer number (758520).

Almost surely, 2^22127820 is an apocalyptic number.

22127820 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 22127820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36408960).

22127820 is an abundant number, since it is smaller than the sum of its proper divisors (50690100).

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

22127820 is a wasteful number, since it uses less digits than its factorization.

22127820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615 (or 2613 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 22127820 is about 4704.0216836235. The cubic root of 22127820 is about 280.7455471071.

Adding to 22127820 its reverse (2872122), we get a palindrome (24999942).

The spelling of 22127820 in words is "twenty-two million, one hundred twenty-seven thousand, eight hundred twenty".