17996891207 has 2 divisors, whose sum is σ = 17996891208. Its totient is φ = 17996891206.

The previous prime is 17996891191. The next prime is 17996891233. The reversal of 17996891207 is 70219869971.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17996891207 - 2⁴ = 17996891191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17996891267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8998445603 + 8998445604.

It is an arithmetic number, because the mean of its divisors is an integer number (8998445604).

Almost surely, 2^17996891207 is an apocalyptic number.

17996891207 is a deficient number, since it is larger than the sum of its proper divisors (1).

17996891207 is an equidigital number, since it uses as much as digits as its factorization.

17996891207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3429216, while the sum is 59.

The spelling of 17996891207 in words is "seventeen billion, nine hundred ninety-six million, eight hundred ninety-one thousand, two hundred seven".