18206210864 has 10 divisors (see below), whose sum is σ = 35274533580. Its totient is φ = 9103105424.

The previous prime is 18206210831. The next prime is 18206210899. The reversal of 18206210864 is 46801260281.

It is a happy number.

It is a super-2 number, since 2×18206210864² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 568944074 + ... + 568944105.

It is an arithmetic number, because the mean of its divisors is an integer number (3527453358).

Almost surely, 2^18206210864 is an apocalyptic number.

It is an amenable number.

18206210864 is a deficient number, since it is larger than the sum of its proper divisors (17068322716).

18206210864 is a wasteful number, since it uses less digits than its factorization.

18206210864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137888187 (or 1137888181 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 18206210864 in words is "eighteen billion, two hundred six million, two hundred ten thousand, eight hundred sixty-four".