21432615135 has 16 divisors (see below), whose sum is σ = 34296031584. Its totient is φ = 11429445632.

The previous prime is 21432615121. The next prime is 21432615161. The reversal of 21432615135 is 53151623412.

It is a cyclic number.

It is not a de Polignac number, because 21432615135 - 2¹⁶ = 21432549599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21432615096 and 21432615105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66679 + ... + 217511.

It is an arithmetic number, because the mean of its divisors is an integer number (2143501974).

Almost surely, 2^21432615135 is an apocalyptic number.

21432615135 is a deficient number, since it is larger than the sum of its proper divisors (12863416449).

21432615135 is a wasteful number, since it uses less digits than its factorization.

21432615135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160314.

The product of its digits is 21600, while the sum is 33.

The spelling of 21432615135 in words is "twenty-one billion, four hundred thirty-two million, six hundred fifteen thousand, one hundred thirty-five".