22420305 has 24 divisors (see below), whose sum is σ = 38973480. Its totient is φ = 11923200.

The previous prime is 22420291. The next prime is 22420313. The reversal of 22420305 is 50302422.

It can be written as a sum of positive squares in 4 ways, for example, as 6066369 + 16353936 = 2463^2 + 4044^2 .

It is not a de Polignac number, because 22420305 - 2⁶ = 22420241 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26631 + ... + 27459.

It is an arithmetic number, because the mean of its divisors is an integer number (1623895).

Almost surely, 2^22420305 is an apocalyptic number.

It is an amenable number.

22420305 is a deficient number, since it is larger than the sum of its proper divisors (16553175).

22420305 is a wasteful number, since it uses less digits than its factorization.

22420305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441 (or 1438 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 22420305 is about 4735.0084477221. The cubic root of 22420305 is about 281.9770993928.

Adding to 22420305 its reverse (50302422), we get a palindrome (72722727).

The spelling of 22420305 in words is "twenty-two million, four hundred twenty thousand, three hundred five".