21336014336 has 120 divisors (see below), whose sum is σ = 53405878680. Its totient is φ = 8440492032.

The previous prime is 21336014309. The next prime is 21336014419. The reversal of 21336014336 is 63341063312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 293435 + ... + 358853.

It is an arithmetic number, because the mean of its divisors is an integer number (445048989).

Almost surely, 2^21336014336 is an apocalyptic number.

21336014336 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21336014336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26702939340).

21336014336 is an abundant number, since it is smaller than the sum of its proper divisors (32069864344).

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

21336014336 is an equidigital number, since it uses as much as digits as its factorization.

21336014336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65464 (or 65441 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 32.

Adding to 21336014336 its reverse (63341063312), we get a palindrome (84677077648).

The spelling of 21336014336 in words is "twenty-one billion, three hundred thirty-six million, fourteen thousand, three hundred thirty-six".