21336311364 has 96 divisors (see below), whose sum is σ = 53429376000. Its totient is φ = 6606665856.

The previous prime is 21336311327. The next prime is 21336311371. The reversal of 21336311364 is 46311363312.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5903622 + ... + 5907234.

It is an arithmetic number, because the mean of its divisors is an integer number (556556000).

Almost surely, 2^21336311364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21336311364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26714688000).

21336311364 is an abundant number, since it is smaller than the sum of its proper divisors (32093064636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21336311364 is a wasteful number, since it uses less digits than its factorization.

21336311364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137 (or 4135 counting only the distinct ones).

The product of its digits is 23328, while the sum is 33.

Adding to 21336311364 its reverse (46311363312), we get a palindrome (67647674676).

The spelling of 21336311364 in words is "twenty-one billion, three hundred thirty-six million, three hundred eleven thousand, three hundred sixty-four".