21432414413 has 4 divisors (see below), whose sum is σ = 21432781728. Its totient is φ = 21432047100.

The previous prime is 21432414389. The next prime is 21432414433. The reversal of 21432414413 is 31441423412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21432414413 - 2³⁰ = 20358672589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432414433) 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, 74513 + ... + 220038.

It is an arithmetic number, because the mean of its divisors is an integer number (5358195432).

Almost surely, 2^21432414413 is an apocalyptic number.

It is an amenable number.

21432414413 is a deficient number, since it is larger than the sum of its proper divisors (367315).

21432414413 is an equidigital number, since it uses as much as digits as its factorization.

21432414413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367314.

The product of its digits is 9216, while the sum is 29.

Adding to 21432414413 its reverse (31441423412), we get a palindrome (52873837825).

The spelling of 21432414413 in words is "twenty-one billion, four hundred thirty-two million, four hundred fourteen thousand, four hundred thirteen".