18447141238256 has 20 divisors (see below), whose sum is σ = 35742204661272. Its totient is φ = 9223346486976.

The previous prime is 18447141238249. The next prime is 18447141238259. The reversal of 18447141238256 is 65283214174481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18447141238259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13328246 + ... + 14647061.

Almost surely, 2^{18447141238256} is an apocalyptic number.

18447141238256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18447141238256 is a deficient number, since it is larger than the sum of its proper divisors (17295063423016).

18447141238256 is a wasteful number, since it uses less digits than its factorization.

18447141238256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28016528 (or 28016522 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 56.

The spelling of 18447141238256 in words is "eighteen trillion, four hundred forty-seven billion, one hundred forty-one million, two hundred thirty-eight thousand, two hundred fifty-six".