20346321666166 has 4 divisors (see below), whose sum is σ = 30519482499252. Its totient is φ = 10173160833082.

The previous prime is 20346321666137. The next prime is 20346321666191. The reversal of 20346321666166 is 66166612364302.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 5086580416540 + ... + 5086580416543.

It is an arithmetic number, because the mean of its divisors is an integer number (7629870624813).

Almost surely, 2^{20346321666166} is an apocalyptic number.

20346321666166 is a deficient number, since it is larger than the sum of its proper divisors (10173160833086).

20346321666166 is a wasteful number, since it uses less digits than its factorization.

20346321666166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10173160833085.

The product of its (nonzero) digits is 6718464, while the sum is 52.

The spelling of 20346321666166 in words is "twenty trillion, three hundred forty-six billion, three hundred twenty-one million, six hundred sixty-six thousand, one hundred sixty-six".