22220426 has 4 divisors (see below), whose sum is σ = 33330642. Its totient is φ = 11110212.

The previous prime is 22220417. The next prime is 22220431. The reversal of 22220426 is 62402222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 9296401 = 3595^2 + 3049^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22220398 and 22220407.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5555105 + ... + 5555108.

Almost surely, 2^22220426 is an apocalyptic number.

22220426 is a deficient number, since it is larger than the sum of its proper divisors (11110216).

22220426 is a wasteful number, since it uses less digits than its factorization.

22220426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110215.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22220426 is about 4713.8546859232. The cubic root of 22220426 is about 281.1366466007.

Adding to 22220426 its reverse (62402222), we get a palindrome (84622648).

The spelling of 22220426 in words is "twenty-two million, two hundred twenty thousand, four hundred twenty-six".