20133666685 has 8 divisors (see below), whose sum is σ = 26356800096. Its totient is φ = 14642666640.

The previous prime is 20133666677. The next prime is 20133666733. The reversal of 20133666685 is 58666633102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20133666685 - 2³ = 20133666677 is a prime.

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, 183033279 + ... + 183033388.

It is an arithmetic number, because the mean of its divisors is an integer number (3294600012).

Almost surely, 2^20133666685 is an apocalyptic number.

It is an amenable number.

20133666685 is a deficient number, since it is larger than the sum of its proper divisors (6223133411).

20133666685 is a wasteful number, since it uses less digits than its factorization.

20133666685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366066683.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 20133666685 in words is "twenty billion, one hundred thirty-three million, six hundred sixty-six thousand, six hundred eighty-five".