21432422135 has 4 divisors (see below), whose sum is σ = 25718906568. Its totient is φ = 17145937704.

The previous prime is 21432422117. The next prime is 21432422153. The reversal of 21432422135 is 53122423412.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21432422117) and next prime (21432422153).

It is a cyclic number.

It is not a de Polignac number, because 21432422135 - 2⁶ = 21432422071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21432422098 and 21432422107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143242209 + ... + 2143242218.

It is an arithmetic number, because the mean of its divisors is an integer number (6429726642).

Almost surely, 2^21432422135 is an apocalyptic number.

21432422135 is a deficient number, since it is larger than the sum of its proper divisors (4286484433).

21432422135 is an equidigital number, since it uses as much as digits as its factorization.

21432422135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4286484432.

The product of its digits is 11520, while the sum is 29.

Adding to 21432422135 its reverse (53122423412), we get a palindrome (74554845547).

The spelling of 21432422135 in words is "twenty-one billion, four hundred thirty-two million, four hundred twenty-two thousand, one hundred thirty-five".