17973650819 has 2 divisors, whose sum is σ = 17973650820. Its totient is φ = 17973650818.

The previous prime is 17973650801. The next prime is 17973650833. The reversal of 17973650819 is 91805637971.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17973650819 is a prime.

It is a super-2 number, since 2×17973650819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17973650869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8986825409 + 8986825410.

It is an arithmetic number, because the mean of its divisors is an integer number (8986825410).

Almost surely, 2^17973650819 is an apocalyptic number.

17973650819 is a deficient number, since it is larger than the sum of its proper divisors (1).

17973650819 is an equidigital number, since it uses as much as digits as its factorization.

17973650819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 17973650819 in words is "seventeen billion, nine hundred seventy-three million, six hundred fifty thousand, eight hundred nineteen".