18191820092 has 6 divisors (see below), whose sum is σ = 31835685168. Its totient is φ = 9095910044.

The previous prime is 18191820043. The next prime is 18191820107. The reversal of 18191820092 is 29002819181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2273977508 + ... + 2273977515.

It is an arithmetic number, because the mean of its divisors is an integer number (5305947528).

Almost surely, 2^18191820092 is an apocalyptic number.

It is an amenable number.

18191820092 is a deficient number, since it is larger than the sum of its proper divisors (13643865076).

18191820092 is a wasteful number, since it uses less digits than its factorization.

18191820092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547955027 (or 4547955025 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 41.

The spelling of 18191820092 in words is "eighteen billion, one hundred ninety-one million, eight hundred twenty thousand, ninety-two".