22420043 has 4 divisors (see below), whose sum is σ = 22690248. Its totient is φ = 22149840.

The previous prime is 22420033. The next prime is 22420063. The reversal of 22420043 is 34002422.

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 22420043 - 2¹⁸ = 22157899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22420003) 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, 134978 + ... + 135143.

It is an arithmetic number, because the mean of its divisors is an integer number (5672562).

Almost surely, 2^22420043 is an apocalyptic number.

22420043 is a deficient number, since it is larger than the sum of its proper divisors (270205).

22420043 is an equidigital number, since it uses as much as digits as its factorization.

22420043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270204.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 22420043 is about 4734.9807813760. The cubic root of 22420043 is about 281.9760010092.

Adding to 22420043 its reverse (34002422), we get a palindrome (56422465).

The spelling of 22420043 in words is "twenty-two million, four hundred twenty thousand, forty-three".