21299836771 has 8 divisors (see below), whose sum is σ = 21602385504. Its totient is φ = 20997359040.

The previous prime is 21299836751. The next prime is 21299836781. The reversal of 21299836771 is 17763899212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21299836771 - 2⁵ = 21299836739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21299836751) 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, 983071 + ... + 1004503.

It is an arithmetic number, because the mean of its divisors is an integer number (2700298188).

Almost surely, 2^21299836771 is an apocalyptic number.

21299836771 is a deficient number, since it is larger than the sum of its proper divisors (302548733).

21299836771 is a wasteful number, since it uses less digits than its factorization.

21299836771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35501.

The product of its digits is 2286144, while the sum is 55.

The spelling of 21299836771 in words is "twenty-one billion, two hundred ninety-nine million, eight hundred thirty-six thousand, seven hundred seventy-one".