18256987373236 has 48 divisors (see below), whose sum is σ = 33379548249600. Its totient is φ = 8727113554560.

The previous prime is 18256987373221. The next prime is 18256987373249. The reversal of 18256987373236 is 63237378965281.

It is a happy number.

It is a super-4 number, since 4×18256987373236⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250234090 + ... + 250307038.

It is an arithmetic number, because the mean of its divisors is an integer number (695407255200).

Almost surely, 2^{18256987373236} is an apocalyptic number.

It is an amenable number.

18256987373236 is a deficient number, since it is larger than the sum of its proper divisors (15122560876364).

18256987373236 is a wasteful number, since it uses less digits than its factorization.

18256987373236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97384 (or 97382 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 70.

The spelling of 18256987373236 in words is "eighteen trillion, two hundred fifty-six billion, nine hundred eighty-seven million, three hundred seventy-three thousand, two hundred thirty-six".