18091166236 has 48 divisors (see below), whose sum is σ = 39152050560. Its totient is φ = 7191184320.

The previous prime is 18091166201. The next prime is 18091166239. The reversal of 18091166236 is 63266119081.

It is a junction number, because it is equal to n+sod(n) for n = 18091166192 and 18091166201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18091166239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821446 + ... + 843181.

It is an arithmetic number, because the mean of its divisors is an integer number (815667720).

Almost surely, 2^18091166236 is an apocalyptic number.

It is an amenable number.

18091166236 is an abundant number, since it is smaller than the sum of its proper divisors (21060884324).

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

18091166236 is a wasteful number, since it uses less digits than its factorization.

18091166236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664674 (or 1664672 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 18091166236 in words is "eighteen billion, ninety-one million, one hundred sixty-six thousand, two hundred thirty-six".