21432234013 has 8 divisors (see below), whose sum is σ = 21893639040. Its totient is φ = 20971054080.

The previous prime is 21432233971. The next prime is 21432234113. The reversal of 21432234013 is 31043223412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21432234013 - 2¹⁷ = 21432102941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432234113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143773 + ... + 252061.

It is an arithmetic number, because the mean of its divisors is an integer number (2736704880).

Almost surely, 2^21432234013 is an apocalyptic number.

It is an amenable number.

21432234013 is a deficient number, since it is larger than the sum of its proper divisors (461405027).

21432234013 is a wasteful number, since it uses less digits than its factorization.

21432234013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112547.

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

Adding to 21432234013 its reverse (31043223412), we get a palindrome (52475457425).

The spelling of 21432234013 in words is "twenty-one billion, four hundred thirty-two million, two hundred thirty-four thousand, thirteen".