21432100411 has 4 divisors (see below), whose sum is σ = 21432455352. Its totient is φ = 21431745472.

The previous prime is 21432100397. The next prime is 21432100429. The reversal of 21432100411 is 11400123412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21432100411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432100471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61741 + ... + 216046.

It is an arithmetic number, because the mean of its divisors is an integer number (5358113838).

Almost surely, 2^21432100411 is an apocalyptic number.

21432100411 is a deficient number, since it is larger than the sum of its proper divisors (354941).

21432100411 is an equidigital number, since it uses as much as digits as its factorization.

21432100411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354940.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21432100411 its reverse (11400123412), we get a palindrome (32832223823).

The spelling of 21432100411 in words is "twenty-one billion, four hundred thirty-two million, one hundred thousand, four hundred eleven".