21432042032 has 20 divisors (see below), whose sum is σ = 41754004656. Its totient is φ = 10656815040.

The previous prime is 21432042019. The next prime is 21432042059. The reversal of 21432042032 is 23024023412.

It is a super-2 number, since 2×21432042032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21432041989 and 21432042007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3697388 + ... + 3703179.

Almost surely, 2^21432042032 is an apocalyptic number.

It is an amenable number.

21432042032 is a deficient number, since it is larger than the sum of its proper divisors (20321962624).

21432042032 is a wasteful number, since it uses less digits than its factorization.

21432042032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400756 (or 7400750 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21432042032 its reverse (23024023412), we get a palindrome (44456065444).

The spelling of 21432042032 in words is "twenty-one billion, four hundred thirty-two million, forty-two thousand, thirty-two".