22021982 has 8 divisors (see below), whose sum is σ = 33404400. Its totient is φ = 10887184.

The previous prime is 22021981. The next prime is 22022009. The reversal of 22021982 is 28912022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021981) 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, 61682 + ... + 62037.

It is an arithmetic number, because the mean of its divisors is an integer number (4175550).

Almost surely, 2^22021982 is an apocalyptic number.

22021982 is a deficient number, since it is larger than the sum of its proper divisors (11382418).

22021982 is a wasteful number, since it uses less digits than its factorization.

22021982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123810.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 22021982 is about 4692.7584638462. The cubic root of 22021982 is about 280.2972268917.

The spelling of 22021982 in words is "twenty-two million, twenty-one thousand, nine hundred eighty-two".