22020321 has 16 divisors (see below), whose sum is σ = 31848768. Its totient is φ = 13478400.

The previous prime is 22020319. The next prime is 22020337. The reversal of 22020321 is 12302022.

It is not a de Polignac number, because 22020321 - 2¹ = 22020319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22020297 and 22020306.

It is not an unprimeable number, because it can be changed into a prime (22020311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3175 + ... + 7356.

It is an arithmetic number, because the mean of its divisors is an integer number (1990548).

Almost surely, 2^22020321 is an apocalyptic number.

It is an amenable number.

22020321 is a deficient number, since it is larger than the sum of its proper divisors (9828447).

22020321 is a wasteful number, since it uses less digits than its factorization.

22020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10592.

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

The square root of 22020321 is about 4692.5814857070. The cubic root of 22020321 is about 280.2901796090.

Adding to 22020321 its reverse (12302022), we get a palindrome (34322343).

The spelling of 22020321 in words is "twenty-two million, twenty thousand, three hundred twenty-one".