21232342132 has 12 divisors (see below), whose sum is σ = 37517343136. Its totient is φ = 10513101240.

The previous prime is 21232342127. The next prime is 21232342139. The reversal of 21232342132 is 23124323212.

It is a junction number, because it is equal to n+sod(n) for n = 21232342097 and 21232342106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232342139) 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, 25766994 + ... + 25767817.

Almost surely, 2^21232342132 is an apocalyptic number.

It is an amenable number.

21232342132 is a deficient number, since it is larger than the sum of its proper divisors (16285001004).

21232342132 is a wasteful number, since it uses less digits than its factorization.

21232342132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51534918 (or 51534916 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

Adding to 21232342132 its reverse (23124323212), we get a palindrome (44356665344).

The spelling of 21232342132 in words is "twenty-one billion, two hundred thirty-two million, three hundred forty-two thousand, one hundred thirty-two".