21432127168 has 56 divisors (see below), whose sum is σ = 44401800960. Its totient is φ = 10244762880.

The previous prime is 21432127153. The next prime is 21432127279. The reversal of 21432127168 is 86172123412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5236803 + ... + 5240893.

Almost surely, 2^21432127168 is an apocalyptic number.

It is an amenable number.

21432127168 is an abundant number, since it is smaller than the sum of its proper divisors (22969673792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21432127168 is a wasteful number, since it uses less digits than its factorization.

21432127168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7685 (or 7675 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The spelling of 21432127168 in words is "twenty-one billion, four hundred thirty-two million, one hundred twenty-seven thousand, one hundred sixty-eight".