17963951966 has 16 divisors (see below), whose sum is σ = 27037882944. Its totient is φ = 8951358624.

The previous prime is 17963951959. The next prime is 17963951977. The reversal of 17963951966 is 66915936971.

It is a junction number, because it is equal to n+sod(n) for n = 17963951899 and 17963951908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1176356 + ... + 1191528.

It is an arithmetic number, because the mean of its divisors is an integer number (1689867684).

Almost surely, 2^17963951966 is an apocalyptic number.

17963951966 is a deficient number, since it is larger than the sum of its proper divisors (9073930978).

17963951966 is a wasteful number, since it uses less digits than its factorization.

17963951966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17155.

The product of its digits is 16533720, while the sum is 62.

The spelling of 17963951966 in words is "seventeen billion, nine hundred sixty-three million, nine hundred fifty-one thousand, nine hundred sixty-six".