18236256712 has 64 divisors (see below), whose sum is σ = 35097955200. Its totient is φ = 8880537600.

The previous prime is 18236256671. The next prime is 18236256737. The reversal of 18236256712 is 21765263281.

It is a super-2 number, since 2×18236256712² (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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23713864 + ... + 23714632.

It is an arithmetic number, because the mean of its divisors is an integer number (548405550).

Almost surely, 2^18236256712 is an apocalyptic number.

It is an amenable number.

18236256712 is a deficient number, since it is larger than the sum of its proper divisors (16861698488).

18236256712 is a wasteful number, since it uses less digits than its factorization.

18236256712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1282 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The spelling of 18236256712 in words is "eighteen billion, two hundred thirty-six million, two hundred fifty-six thousand, seven hundred twelve".