22142320 has 20 divisors (see below), whose sum is σ = 51481080. Its totient is φ = 8856896.

The previous prime is 22142299. The next prime is 22142327. The reversal of 22142320 is 2324122.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 22142294 and 22142303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22142327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138310 + ... + 138469.

It is an arithmetic number, because the mean of its divisors is an integer number (2574054).

Almost surely, 2^22142320 is an apocalyptic number.

22142320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22142320 is an abundant number, since it is smaller than the sum of its proper divisors (29338760).

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

22142320 is a wasteful number, since it uses less digits than its factorization.

22142320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276792 (or 276786 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22142320 is about 4705.5626656118. The cubic root of 22142320 is about 280.8068563787.

Adding to 22142320 its reverse (2324122), we get a palindrome (24466442).

The spelling of 22142320 in words is "twenty-two million, one hundred forty-two thousand, three hundred twenty".