22420243 has 4 divisors (see below), whose sum is σ = 22941688. Its totient is φ = 21898800.

The previous prime is 22420241. The next prime is 22420249. The reversal of 22420243 is 34202422.

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

It is a cyclic number.

It is not a de Polignac number, because 22420243 - 2¹ = 22420241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22420243.

It is not an unprimeable number, because it can be changed into a prime (22420241) 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, 260658 + ... + 260743.

It is an arithmetic number, because the mean of its divisors is an integer number (5735422).

Almost surely, 2^22420243 is an apocalyptic number.

22420243 is a deficient number, since it is larger than the sum of its proper divisors (521445).

22420243 is an equidigital number, since it uses as much as digits as its factorization.

22420243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521444.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22420243 is about 4735.0019007388. The cubic root of 22420243 is about 281.9768394707.

Adding to 22420243 its reverse (34202422), we get a palindrome (56622665).

The spelling of 22420243 in words is "twenty-two million, four hundred twenty thousand, two hundred forty-three".