22421789 has 8 divisors (see below), whose sum is σ = 24211320. Its totient is φ = 20641536.

The previous prime is 22421779. The next prime is 22421797. The reversal of 22421789 is 98712422.

It can be written as a sum of positive squares in 4 ways, for example, as 8508889 + 13912900 = 2917^2 + 3730^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22421789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22421779) 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 7 ways as a sum of consecutive naturals, for example, 3209 + ... + 7425.

It is an arithmetic number, because the mean of its divisors is an integer number (3026415).

Almost surely, 2^22421789 is an apocalyptic number.

It is an amenable number.

22421789 is a deficient number, since it is larger than the sum of its proper divisors (1789531).

22421789 is a wasteful number, since it uses less digits than its factorization.

22421789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639.

The product of its digits is 16128, while the sum is 35.

The square root of 22421789 is about 4735.1651502350. The cubic root of 22421789 is about 281.9833206103.

The spelling of 22421789 in words is "twenty-two million, four hundred twenty-one thousand, seven hundred eighty-nine".