18162018909 has 32 divisors (see below), whose sum is σ = 27085255680. Its totient is φ = 12027884400.

The previous prime is 18162018883. The next prime is 18162018937. The reversal of 18162018909 is 90981026181.

18162018909 is a `hidden beast` number, since 1 + 8 + 1 + 620 + 18 + 9 + 0 + 9 = 666.

It is not a de Polignac number, because 18162018909 - 2⁷ = 18162018781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18162014909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3341424 + ... + 3346854.

It is an arithmetic number, because the mean of its divisors is an integer number (846414240).

Almost surely, 2^18162018909 is an apocalyptic number.

It is an amenable number.

18162018909 is a deficient number, since it is larger than the sum of its proper divisors (8923236771).

18162018909 is a wasteful number, since it uses less digits than its factorization.

18162018909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238 (or 6232 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The spelling of 18162018909 in words is "eighteen billion, one hundred sixty-two million, eighteen thousand, nine hundred nine".