21133162069 has 4 divisors (see below), whose sum is σ = 21205289196. Its totient is φ = 21061034944.

The previous prime is 21133162067. The next prime is 21133162073. The reversal of 21133162069 is 96026133112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20775763044 + 357399025 = 144138^2 + 18905^2 .

It is a cyclic number.

It is not a de Polignac number, because 21133162069 - 2¹ = 21133162067 is a prime.

It is a super-2 number, since 2×21133162069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133162067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36063124 + ... + 36063709.

It is an arithmetic number, because the mean of its divisors is an integer number (5301322299).

Almost surely, 2^21133162069 is an apocalyptic number.

It is an amenable number.

21133162069 is a deficient number, since it is larger than the sum of its proper divisors (72127127).

21133162069 is an equidigital number, since it uses as much as digits as its factorization.

21133162069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72127126.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 21133162069 in words is "twenty-one billion, one hundred thirty-three million, one hundred sixty-two thousand, sixty-nine".