21432234033 has 24 divisors (see below), whose sum is σ = 37461385728. Its totient is φ = 11526579072.

The previous prime is 21432233971. The next prime is 21432234113. The reversal of 21432234033 is 33043223412.

It is not a de Polignac number, because 21432234033 - 2²² = 21428039729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21432233988 and 21432234006.

It is not an unprimeable number, because it can be changed into a prime (21432234133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10004641 + ... + 10006782.

It is an arithmetic number, because the mean of its divisors is an integer number (1560891072).

Almost surely, 2^21432234033 is an apocalyptic number.

It is an amenable number.

21432234033 is a deficient number, since it is larger than the sum of its proper divisors (16029151695).

21432234033 is a wasteful number, since it uses less digits than its factorization.

21432234033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20011453 (or 20011450 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21432234033 its reverse (33043223412), we get a palindrome (54475457445).

The spelling of 21432234033 in words is "twenty-one billion, four hundred thirty-two million, two hundred thirty-four thousand, thirty-three".