21289314635 has 16 divisors (see below), whose sum is σ = 26375784192. Its totient is φ = 16479235200.

The previous prime is 21289314611. The next prime is 21289314667. The reversal of 21289314635 is 53641398212.

It is not a de Polignac number, because 21289314635 - 2¹⁰ = 21289313611 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1739357 + ... + 1751553.

It is an arithmetic number, because the mean of its divisors is an integer number (1648486512).

Almost surely, 2^21289314635 is an apocalyptic number.

21289314635 is a deficient number, since it is larger than the sum of its proper divisors (5086469557).

21289314635 is a wasteful number, since it uses less digits than its factorization.

21289314635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23494.

The product of its digits is 311040, while the sum is 44.

The spelling of 21289314635 in words is "twenty-one billion, two hundred eighty-nine million, three hundred fourteen thousand, six hundred thirty-five".