21432340001 has 16 divisors (see below), whose sum is σ = 21914089920. Its totient is φ = 20956657920.

The previous prime is 21432339979. The next prime is 21432340037. The reversal of 21432340001 is 10004323412.

It is a cyclic number.

It is not a de Polignac number, because 21432340001 - 2¹⁴ = 21432323617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432340201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6578765 + ... + 6582021.

It is an arithmetic number, because the mean of its divisors is an integer number (1369630620).

Almost surely, 2^21432340001 is an apocalyptic number.

It is an amenable number.

21432340001 is a deficient number, since it is larger than the sum of its proper divisors (481749919).

21432340001 is a wasteful number, since it uses less digits than its factorization.

21432340001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21432340001 its reverse (10004323412), we get a palindrome (31436663413).

The spelling of 21432340001 in words is "twenty-one billion, four hundred thirty-two million, three hundred forty thousand, one".