17668939964 has 24 divisors (see below), whose sum is σ = 33538732080. Its totient is φ = 8096223744.

The previous prime is 17668939943. The next prime is 17668940027. The reversal of 17668939964 is 46993986671.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 17668939894 and 17668939903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215029 + ... + 1229484.

It is an arithmetic number, because the mean of its divisors is an integer number (1397447170).

Almost surely, 2^17668939964 is an apocalyptic number.

It is an amenable number.

17668939964 is a deficient number, since it is larger than the sum of its proper divisors (15869792116).

17668939964 is a wasteful number, since it uses less digits than its factorization.

17668939964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444669 (or 2444667 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 68.

The spelling of 17668939964 in words is "seventeen billion, six hundred sixty-eight million, nine hundred thirty-nine thousand, nine hundred sixty-four".