18198049285 has 24 divisors (see below), whose sum is σ = 23788477440. Its totient is φ = 13357985472.

The previous prime is 18198049283. The next prime is 18198049321. The reversal of 18198049285 is 58294089181.

It is not a de Polignac number, because 18198049285 - 2¹ = 18198049283 is a prime.

It is a super-2 number, since 2×18198049285² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18198049283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76636 + ... + 205594.

It is an arithmetic number, because the mean of its divisors is an integer number (991186560).

Almost surely, 2^18198049285 is an apocalyptic number.

It is an amenable number.

18198049285 is a deficient number, since it is larger than the sum of its proper divisors (5590428155).

18198049285 is a wasteful number, since it uses less digits than its factorization.

18198049285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129157 (or 129144 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 55.

The spelling of 18198049285 in words is "eighteen billion, one hundred ninety-eight million, forty-nine thousand, two hundred eighty-five".