21422224234 has 16 divisors (see below), whose sum is σ = 34649556480. Its totient is φ = 9899871840.

The previous prime is 21422224231. The next prime is 21422224249. The reversal of 21422224234 is 43242222412.

It is a happy number.

It is a super-2 number, since 2×21422224234² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21422224231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6873354 + ... + 6876469.

It is an arithmetic number, because the mean of its divisors is an integer number (2165597280).

Almost surely, 2^21422224234 is an apocalyptic number.

21422224234 is a deficient number, since it is larger than the sum of its proper divisors (13227332246).

21422224234 is a wasteful number, since it uses less digits than its factorization.

21422224234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13749885.

The product of its digits is 12288, while the sum is 28.

Adding to 21422224234 its reverse (43242222412), we get a palindrome (64664446646).

The spelling of 21422224234 in words is "twenty-one billion, four hundred twenty-two million, two hundred twenty-four thousand, two hundred thirty-four".