21743474364663 has 4 divisors (see below), whose sum is σ = 28991299152888. Its totient is φ = 14495649576440.

The previous prime is 21743474364659. The next prime is 21743474364737. The reversal of 21743474364663 is 36646347434712.

It is a happy number.

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 21743474364663 - 2² = 21743474364659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21743474364597 and 21743474364606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21743474364163) 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, 3623912394108 + ... + 3623912394113.

It is an arithmetic number, because the mean of its divisors is an integer number (7247824788222).

Almost surely, 2^{21743474364663} is an apocalyptic number.

21743474364663 is a deficient number, since it is larger than the sum of its proper divisors (7247824788225).

21743474364663 is an equidigital number, since it uses as much as digits as its factorization.

21743474364663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7247824788224.

The product of its digits is 146313216, while the sum is 60.

The spelling of 21743474364663 in words is "twenty-one trillion, seven hundred forty-three billion, four hundred seventy-four million, three hundred sixty-four thousand, six hundred sixty-three".