17950245517 has 2 divisors, whose sum is σ = 17950245518. Its totient is φ = 17950245516.

The previous prime is 17950245473. The next prime is 17950245529. The reversal of 17950245517 is 71554205971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10955599561 + 6994645956 = 104669^2 + 83634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17950245517 is a prime.

It is a super-2 number, since 2×17950245517² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17950245017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8975122758 + 8975122759.

It is an arithmetic number, because the mean of its divisors is an integer number (8975122759).

Almost surely, 2^17950245517 is an apocalyptic number.

It is an amenable number.

17950245517 is a deficient number, since it is larger than the sum of its proper divisors (1).

17950245517 is an equidigital number, since it uses as much as digits as its factorization.

17950245517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 441000, while the sum is 46.

The spelling of 17950245517 in words is "seventeen billion, nine hundred fifty million, two hundred forty-five thousand, five hundred seventeen".