22236437 has 4 divisors (see below), whose sum is σ = 22245900. Its totient is φ = 22226976.

The previous prime is 22236427. The next prime is 22236439. The reversal of 22236437 is 73463222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 343396 + 21893041 = 586^2 + 4679^2 .

It is a cyclic number.

It is not a de Polignac number, because 22236437 - 2¹² = 22232341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22236439) 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, 1793 + ... + 6905.

It is an arithmetic number, because the mean of its divisors is an integer number (5561475).

Almost surely, 2^22236437 is an apocalyptic number.

It is an amenable number.

22236437 is a deficient number, since it is larger than the sum of its proper divisors (9463).

22236437 is an equidigital number, since it uses as much as digits as its factorization.

22236437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9462.

The product of its digits is 12096, while the sum is 29.

The square root of 22236437 is about 4715.5526717449. The cubic root of 22236437 is about 281.2041550295.

Adding to 22236437 its reverse (73463222), we get a palindrome (95699659).

The spelling of 22236437 in words is "twenty-two million, two hundred thirty-six thousand, four hundred thirty-seven".