22231020 has 96 divisors (see below), whose sum is σ = 72930816. Its totient is φ = 4953600.

The previous prime is 22230997. The next prime is 22231037. The reversal of 22231020 is 2013222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22230987 and 22231005.

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, 16575 + ... + 17865.

It is an arithmetic number, because the mean of its divisors is an integer number (759696).

Almost surely, 2^22231020 is an apocalyptic number.

22231020 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 22231020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36465408).

22231020 is an abundant number, since it is smaller than the sum of its proper divisors (50699796).

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

22231020 is a wasteful number, since it uses less digits than its factorization.

22231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351 (or 1349 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 22231020 is about 4714.9782608194. The cubic root of 22231020 is about 281.1813185379.

Adding to 22231020 its reverse (2013222), we get a palindrome (24244242).

The spelling of 22231020 in words is "twenty-two million, two hundred thirty-one thousand, twenty".