21745753755267 has 8 divisors (see below), whose sum is σ = 29024322148096. Its totient is φ = 14482177266312.

The previous prime is 21745753755233. The next prime is 21745753755289. The reversal of 21745753755267 is 76255735754712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21745753755267 - 2¹⁶ = 21745753689731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21745753755198 and 21745753755207.

It is not an unprimeable number, because it can be changed into a prime (21745753755227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3747972583 + ... + 3747978384.

It is an arithmetic number, because the mean of its divisors is an integer number (3628040268512).

Almost surely, 2^{21745753755267} is an apocalyptic number.

21745753755267 is a deficient number, since it is larger than the sum of its proper divisors (7278568392829).

21745753755267 is an equidigital number, since it uses as much as digits as its factorization.

21745753755267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7495951937.

The product of its digits is 432180000, while the sum is 66.

The spelling of 21745753755267 in words is "twenty-one trillion, seven hundred forty-five billion, seven hundred fifty-three million, seven hundred fifty-five thousand, two hundred sixty-seven".