22420312 has 16 divisors (see below), whose sum is σ = 42135840. Its totient is φ = 11184096.

The previous prime is 22420291. The next prime is 22420313. The reversal of 22420312 is 21302422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22420313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678 + ... + 6730.

It is an arithmetic number, because the mean of its divisors is an integer number (2633490).

Almost surely, 2^22420312 is an apocalyptic number.

It is an amenable number.

22420312 is a deficient number, since it is larger than the sum of its proper divisors (19715528).

22420312 is a wasteful number, since it uses less digits than its factorization.

22420312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6522 (or 6518 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22420312 is about 4735.0091868971. The cubic root of 22420312 is about 281.9771287388.

Adding to 22420312 its reverse (21302422), we get a palindrome (43722734).

The spelling of 22420312 in words is "twenty-two million, four hundred twenty thousand, three hundred twelve".