22381789 has 2 divisors, whose sum is σ = 22381790. Its totient is φ = 22381788.

The previous prime is 22381787. The next prime is 22381813. The reversal of 22381789 is 98718322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 1542564 = 4565^2 + 1242^2 .

It is a cyclic number.

It is not a de Polignac number, because 22381789 - 2¹ = 22381787 is a prime.

Together with 22381787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22381787) 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 as a sum of consecutive naturals, namely, 11190894 + 11190895.

It is an arithmetic number, because the mean of its divisors is an integer number (11190895).

Almost surely, 2^22381789 is an apocalyptic number.

It is an amenable number.

22381789 is a deficient number, since it is larger than the sum of its proper divisors (1).

22381789 is an equidigital number, since it uses as much as digits as its factorization.

22381789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 22381789 is about 4730.9395472781. The cubic root of 22381789 is about 281.8155366920.

The spelling of 22381789 in words is "twenty-two million, three hundred eighty-one thousand, seven hundred eighty-nine".