17445572020447 has 2 divisors, whose sum is σ = 17445572020448. Its totient is φ = 17445572020446.

The previous prime is 17445572020427. The next prime is 17445572020451. The reversal of 17445572020447 is 74402027554471.

It is a strong prime.

It is an emirp because it is prime and its reverse (74402027554471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17445572020447 - 2²⁷ = 17445437802719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17445572020394 and 17445572020403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17445572020427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8722786010223 + 8722786010224.

It is an arithmetic number, because the mean of its divisors is an integer number (8722786010224).

Almost surely, 2^{17445572020447} is an apocalyptic number.

17445572020447 is a deficient number, since it is larger than the sum of its proper divisors (1).

17445572020447 is an equidigital number, since it uses as much as digits as its factorization.

17445572020447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8780800, while the sum is 52.

The spelling of 17445572020447 in words is "seventeen trillion, four hundred forty-five billion, five hundred seventy-two million, twenty thousand, four hundred forty-seven".