21365633055007 has 4 divisors (see below), whose sum is σ = 22294573622640. Its totient is φ = 20436692487376.

The previous prime is 21365633054989. The next prime is 21365633055047. The reversal of 21365633055007 is 70055033656312.

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 21365633055007 - 2²⁷ = 21365498837279 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 (21365633055047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464470283782 + ... + 464470283827.

It is an arithmetic number, because the mean of its divisors is an integer number (5573643405660).

Almost surely, 2^{21365633055007} is an apocalyptic number.

21365633055007 is a deficient number, since it is larger than the sum of its proper divisors (928940567633).

21365633055007 is an equidigital number, since it uses as much as digits as its factorization.

21365633055007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928940567632.

The product of its (nonzero) digits is 1701000, while the sum is 46.

The spelling of 21365633055007 in words is "twenty-one trillion, three hundred sixty-five billion, six hundred thirty-three million, fifty-five thousand, seven".