21748323241013 has 4 divisors (see below), whose sum is σ = 21758304116640. Its totient is φ = 21738342365388.

The previous prime is 21748323241009. The next prime is 21748323241081. The reversal of 21748323241013 is 31014232384712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21748323241013 - 2² = 21748323241009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21748323241913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4990434545 + ... + 4990438902.

It is an arithmetic number, because the mean of its divisors is an integer number (5439576029160).

Almost surely, 2^{21748323241013} is an apocalyptic number.

It is an amenable number.

21748323241013 is a deficient number, since it is larger than the sum of its proper divisors (9980875627).

21748323241013 is an equidigital number, since it uses as much as digits as its factorization.

21748323241013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9980875626.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 21748323241013 in words is "twenty-one trillion, seven hundred forty-eight billion, three hundred twenty-three million, two hundred forty-one thousand, thirteen".