21450035147017 has 2 divisors, whose sum is σ = 21450035147018. Its totient is φ = 21450035147016.

The previous prime is 21450035147011. The next prime is 21450035147033. The reversal of 21450035147017 is 71074153005412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11527308345721 + 9922726801296 = 3395189^2 + 3150036^2 .

It is a cyclic number.

It is not a de Polignac number, because 21450035147017 - 2¹¹ = 21450035144969 is a prime.

It is a super-2 number, since 2×21450035147017² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21450035147011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10725017573508 + 10725017573509.

It is an arithmetic number, because the mean of its divisors is an integer number (10725017573509).

Almost surely, 2^{21450035147017} is an apocalyptic number.

It is an amenable number.

21450035147017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21450035147017 is an equidigital number, since it uses as much as digits as its factorization.

21450035147017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 21450035147017 in words is "twenty-one trillion, four hundred fifty billion, thirty-five million, one hundred forty-seven thousand, seventeen".