21336996844799 has 4 divisors (see below), whose sum is σ = 21337483046880. Its totient is φ = 21336510642720.

The previous prime is 21336996844729. The next prime is 21336996844907. The reversal of 21336996844799 is 99744869963312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21336996844799 - 2³² = 21332701877503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21336996844729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243035207 + ... + 243122984.

It is an arithmetic number, because the mean of its divisors is an integer number (5334370761720).

Almost surely, 2^{21336996844799} is an apocalyptic number.

21336996844799 is a deficient number, since it is larger than the sum of its proper divisors (486202081).

21336996844799 is an equidigital number, since it uses as much as digits as its factorization.

21336996844799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486202080.

The product of its digits is 3809369088, while the sum is 80.

The spelling of 21336996844799 in words is "twenty-one trillion, three hundred thirty-six billion, nine hundred ninety-six million, eight hundred forty-four thousand, seven hundred ninety-nine".