22236413721 has 16 divisors (see below), whose sum is σ = 29777872320. Its totient is φ = 14759712320.

The previous prime is 22236413699. The next prime is 22236413741. The reversal of 22236413721 is 12731463222.

It is a cyclic number.

It is not a de Polignac number, because 22236413721 - 2¹⁰ = 22236412697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22236413741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 963406 + ... + 986216.

It is an arithmetic number, because the mean of its divisors is an integer number (1861117020).

Almost surely, 2^22236413721 is an apocalyptic number.

It is an amenable number.

22236413721 is a deficient number, since it is larger than the sum of its proper divisors (7541458599).

22236413721 is a wasteful number, since it uses less digits than its factorization.

22236413721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24216.

The product of its digits is 24192, while the sum is 33.

Adding to 22236413721 its reverse (12731463222), we get a palindrome (34967876943).

The spelling of 22236413721 in words is "twenty-two billion, two hundred thirty-six million, four hundred thirteen thousand, seven hundred twenty-one".