18211018195 has 16 divisors (see below), whose sum is σ = 22004881920. Its totient is φ = 14467968000.

The previous prime is 18211018183. The next prime is 18211018207. The reversal of 18211018195 is 59181011281.

It is an interprime number because it is at equal distance from previous prime (18211018183) and next prime (18211018207).

It is not a de Polignac number, because 18211018195 - 2¹¹ = 18211016147 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 558091 + ... + 589819.

It is an arithmetic number, because the mean of its divisors is an integer number (1375305120).

Almost surely, 2^18211018195 is an apocalyptic number.

18211018195 is a deficient number, since it is larger than the sum of its proper divisors (3793863725).

18211018195 is a wasteful number, since it uses less digits than its factorization.

18211018195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32526.

The product of its (nonzero) digits is 5760, while the sum is 37.

The spelling of 18211018195 in words is "eighteen billion, two hundred eleven million, eighteen thousand, one hundred ninety-five".