21226434232 has 32 divisors (see below), whose sum is σ = 41207356800. Its totient is φ = 10238435200.

The previous prime is 21226434223. The next prime is 21226434233. The reversal of 21226434232 is 23243462212.

It is a junction number, because it is equal to n+sod(n) for n = 21226434194 and 21226434203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21226434233) 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, 235257 + ... + 312727.

It is an arithmetic number, because the mean of its divisors is an integer number (1287729900).

Almost surely, 2^21226434232 is an apocalyptic number.

It is an amenable number.

21226434232 is a deficient number, since it is larger than the sum of its proper divisors (19980922568).

21226434232 is a wasteful number, since it uses less digits than its factorization.

21226434232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78687 (or 78683 counting only the distinct ones).

The product of its digits is 27648, while the sum is 31.

Adding to 21226434232 its reverse (23243462212), we get a palindrome (44469896444).

The spelling of 21226434232 in words is "twenty-one billion, two hundred twenty-six million, four hundred thirty-four thousand, two hundred thirty-two".