21664114835 has 16 divisors (see below), whose sum is σ = 28508792832. Its totient is φ = 15673221600.

The previous prime is 21664114817. The next prime is 21664114837. The reversal of 21664114835 is 53841146612.

It is not a de Polignac number, because 21664114835 - 2¹² = 21664110739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21664114792 and 21664114801.

It is not an unprimeable number, because it can be changed into a prime (21664114837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1020629 + ... + 1041638.

It is an arithmetic number, because the mean of its divisors is an integer number (1781799552).

Almost surely, 2^21664114835 is an apocalyptic number.

21664114835 is a deficient number, since it is larger than the sum of its proper divisors (6844677997).

21664114835 is a wasteful number, since it uses less digits than its factorization.

21664114835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062474.

The product of its digits is 138240, while the sum is 41.

The spelling of 21664114835 in words is "twenty-one billion, six hundred sixty-four million, one hundred fourteen thousand, eight hundred thirty-five".