21336313811 has 24 divisors (see below), whose sum is σ = 23468084640. Its totient is φ = 19330121216.

The previous prime is 21336313799. The next prime is 21336313841. The reversal of 21336313811 is 11831363312.

It is a de Polignac number, because none of the positive numbers 2^k-21336313811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21336313841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5130545 + ... + 5134701.

It is an arithmetic number, because the mean of its divisors is an integer number (977836860).

Almost surely, 2^21336313811 is an apocalyptic number.

21336313811 is a deficient number, since it is larger than the sum of its proper divisors (2131770829).

21336313811 is a wasteful number, since it uses less digits than its factorization.

21336313811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591 (or 4562 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The spelling of 21336313811 in words is "twenty-one billion, three hundred thirty-six million, three hundred thirteen thousand, eight hundred eleven".