22420505 has 8 divisors (see below), whose sum is σ = 26940552. Its totient is φ = 17912448.

The previous prime is 22420493. The next prime is 22420507. The reversal of 22420505 is 50502422.

It can be written as a sum of positive squares in 4 ways, for example, as 620944 + 21799561 = 788^2 + 4669^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22420505 - 2⁶ = 22420441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22420507) 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, 1829 + ... + 6941.

It is an arithmetic number, because the mean of its divisors is an integer number (3367569).

Almost surely, 2^22420505 is an apocalyptic number.

It is an amenable number.

22420505 is a deficient number, since it is larger than the sum of its proper divisors (4520047).

22420505 is an equidigital number, since it uses as much as digits as its factorization.

22420505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5995.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22420505 is about 4735.0295669615. The cubic root of 22420505 is about 281.9779378478.

Adding to 22420505 its reverse (50502422), we get a palindrome (72922927).

The spelling of 22420505 in words is "twenty-two million, four hundred twenty thousand, five hundred five".