22051320 has 32 divisors (see below), whose sum is σ = 66154320. Its totient is φ = 5880320.

The previous prime is 22051313. The next prime is 22051331. The reversal of 22051320 is 2315022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22051320.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 91761 + ... + 92000.

Almost surely, 2^22051320 is an apocalyptic number.

22051320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22051320 is an abundant number, since it is smaller than the sum of its proper divisors (44103000).

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

22051320 is a wasteful number, since it uses less digits than its factorization.

22051320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183775 (or 183771 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 22051320 is about 4695.8833034904. The cubic root of 22051320 is about 280.4216436522.

Adding to 22051320 its reverse (2315022), we get a palindrome (24366342).

The spelling of 22051320 in words is "twenty-two million, fifty-one thousand, three hundred twenty".