20156631166 has 8 divisors (see below), whose sum is σ = 34554224880. Its totient is φ = 8638556208.

The previous prime is 20156631161. The next prime is 20156631169. The reversal of 20156631166 is 66113665102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20156631161) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 719879671 + ... + 719879698.

It is an arithmetic number, because the mean of its divisors is an integer number (4319278110).

Almost surely, 2^20156631166 is an apocalyptic number.

20156631166 is a deficient number, since it is larger than the sum of its proper divisors (14397593714).

20156631166 is a wasteful number, since it uses less digits than its factorization.

20156631166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439759378.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 20156631166 in words is "twenty billion, one hundred fifty-six million, six hundred thirty-one thousand, one hundred sixty-six".