17985471503 has 2 divisors, whose sum is σ = 17985471504. Its totient is φ = 17985471502.

The previous prime is 17985471479. The next prime is 17985471509. The reversal of 17985471503 is 30517458971.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17985471503 - 2¹⁰ = 17985470479 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17985471509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8992735751 + 8992735752.

It is an arithmetic number, because the mean of its divisors is an integer number (8992735752).

Almost surely, 2^17985471503 is an apocalyptic number.

17985471503 is a deficient number, since it is larger than the sum of its proper divisors (1).

17985471503 is an equidigital number, since it uses as much as digits as its factorization.

17985471503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 50.

The spelling of 17985471503 in words is "seventeen billion, nine hundred eighty-five million, four hundred seventy-one thousand, five hundred three".