18986867166 has 48 divisors (see below), whose sum is σ = 39322800000. Its totient is φ = 6111595440.

The previous prime is 18986867147. The next prime is 18986867167. The reversal of 18986867166 is 66176868981.

It is a super-2 number, since 2×18986867166² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18986867097 and 18986867106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18986867167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2873935 + ... + 2880533.

It is an arithmetic number, because the mean of its divisors is an integer number (819225000).

Almost surely, 2^18986867166 is an apocalyptic number.

18986867166 is an abundant number, since it is smaller than the sum of its proper divisors (20335932834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18986867166 is a wasteful number, since it uses less digits than its factorization.

18986867166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7165 (or 7134 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 66.

The spelling of 18986867166 in words is "eighteen billion, nine hundred eighty-six million, eight hundred sixty-seven thousand, one hundred sixty-six".