21432340214 has 16 divisors (see below), whose sum is σ = 33905273280. Its totient is φ = 10132740360.

The previous prime is 21432340207. The next prime is 21432340253. The reversal of 21432340214 is 41204323412.

It is a congruent number.

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, 519332 + ... + 559079.

It is an arithmetic number, because the mean of its divisors is an integer number (2119079580).

Almost surely, 2^21432340214 is an apocalyptic number.

21432340214 is a deficient number, since it is larger than the sum of its proper divisors (12472933066).

21432340214 is a wasteful number, since it uses less digits than its factorization.

21432340214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078955.

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

Adding to 21432340214 its reverse (41204323412), we get a palindrome (62636663626).

The spelling of 21432340214 in words is "twenty-one billion, four hundred thirty-two million, three hundred forty thousand, two hundred fourteen".