21432041331 has 4 divisors (see below), whose sum is σ = 28576055112. Its totient is φ = 14288027552.

The previous prime is 21432041297. The next prime is 21432041341. The reversal of 21432041331 is 13314023412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21432041331 - 2¹¹ = 21432039283 is a prime.

It is a super-2 number, since 2×21432041331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21432041341) 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, 3572006886 + ... + 3572006891.

It is an arithmetic number, because the mean of its divisors is an integer number (7144013778).

Almost surely, 2^21432041331 is an apocalyptic number.

21432041331 is a deficient number, since it is larger than the sum of its proper divisors (7144013781).

21432041331 is an equidigital number, since it uses as much as digits as its factorization.

21432041331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7144013780.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21432041331 its reverse (13314023412), we get a palindrome (34746064743).

The spelling of 21432041331 in words is "twenty-one billion, four hundred thirty-two million, forty-one thousand, three hundred thirty-one".