21136276569 has 8 divisors (see below), whose sum is σ = 28182395392. Its totient is φ = 14090504400.

The previous prime is 21136276561. The next prime is 21136276589. The reversal of 21136276569 is 96567263112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21136276569 - 2³ = 21136276561 is a prime.

It is a super-2 number, since 2×21136276569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21136276561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141192 + ... + 249414.

It is an arithmetic number, because the mean of its divisors is an integer number (3522799424).

Almost surely, 2^21136276569 is an apocalyptic number.

It is an amenable number.

21136276569 is a deficient number, since it is larger than the sum of its proper divisors (7046118823).

21136276569 is a wasteful number, since it uses less digits than its factorization.

21136276569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173327.

The product of its digits is 816480, while the sum is 48.

The spelling of 21136276569 in words is "twenty-one billion, one hundred thirty-six million, two hundred seventy-six thousand, five hundred sixty-nine".