20344517644267 has 2 divisors, whose sum is σ = 20344517644268. Its totient is φ = 20344517644266.

The previous prime is 20344517644219. The next prime is 20344517644271. The reversal of 20344517644267 is 76244671544302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20344517644267 - 2³⁵ = 20310157905899 is a prime.

It is not a weakly prime, because it can be changed into another prime (20344517644567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172258822133 + 10172258822134.

It is an arithmetic number, because the mean of its divisors is an integer number (10172258822134).

Almost surely, 2^{20344517644267} is an apocalyptic number.

20344517644267 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344517644267 is an equidigital number, since it uses as much as digits as its factorization.

20344517644267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27095040, while the sum is 55.

The spelling of 20344517644267 in words is "twenty trillion, three hundred forty-four billion, five hundred seventeen million, six hundred forty-four thousand, two hundred sixty-seven".