20221392 has 20 divisors (see below), whose sum is σ = 52238720. Its totient is φ = 6740448.

The previous prime is 20221391. The next prime is 20221403. The reversal of 20221392 is 29312202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221391) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 210592 + ... + 210687.

It is an arithmetic number, because the mean of its divisors is an integer number (2611936).

Almost surely, 2^20221392 is an apocalyptic number.

It is an amenable number.

20221392 is an abundant number, since it is smaller than the sum of its proper divisors (32017328).

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

20221392 is a wasteful number, since it uses less digits than its factorization.

20221392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421290 (or 421284 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20221392 is about 4496.8202098816. The cubic root of 20221392 is about 272.4396724181.

Adding to 20221392 its reverse (29312202), we get a palindrome (49533594).

The spelling of 20221392 in words is "twenty million, two hundred twenty-one thousand, three hundred ninety-two".