20168666870 has 32 divisors (see below), whose sum is σ = 39616577280. Its totient is φ = 7331718240.

The previous prime is 20168666831. The next prime is 20168666911. The reversal of 20168666870 is 7866686102.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 337469 + ... + 392711.

It is an arithmetic number, because the mean of its divisors is an integer number (1238018040).

Almost surely, 2^20168666870 is an apocalyptic number.

20168666870 is a deficient number, since it is larger than the sum of its proper divisors (19447910410).

20168666870 is a wasteful number, since it uses less digits than its factorization.

20168666870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58580.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 20168666870 in words is "twenty billion, one hundred sixty-eight million, six hundred sixty-six thousand, eight hundred seventy".