21432402341 has 8 divisors (see below), whose sum is σ = 24672964800. Its totient is φ = 18236537568.

The previous prime is 21432402337. The next prime is 21432402349. The reversal of 21432402341 is 14320423412.

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

It is a cyclic number.

It is not a de Polignac number, because 21432402341 - 2² = 21432402337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21432402341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432402349) 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, 11173391 + ... + 11175308.

It is an arithmetic number, because the mean of its divisors is an integer number (3084120600).

Almost surely, 2^21432402341 is an apocalyptic number.

It is an amenable number.

21432402341 is a deficient number, since it is larger than the sum of its proper divisors (3240562459).

21432402341 is a wasteful number, since it uses less digits than its factorization.

21432402341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22348843.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21432402341 its reverse (14320423412), we get a palindrome (35752825753).

The spelling of 21432402341 in words is "twenty-one billion, four hundred thirty-two million, four hundred two thousand, three hundred forty-one".