18731060136 has 128 divisors (see below), whose sum is σ = 52781760000. Its totient is φ = 6230815488.

The previous prime is 18731060123. The next prime is 18731060147. The reversal of 18731060136 is 63106013781.

18731060136 is a `hidden beast` number, since 1 + 8 + 7 + 3 + 10 + 601 + 36 = 666.

It is a super-2 number, since 2×18731060136² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18731060136.

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 in 31 ways as a sum of consecutive naturals, for example, 12578880 + ... + 12580368.

It is an arithmetic number, because the mean of its divisors is an integer number (412357500).

Almost surely, 2^18731060136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18731060136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26390880000).

18731060136 is an abundant number, since it is smaller than the sum of its proper divisors (34050699864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18731060136 is an equidigital number, since it uses as much as digits as its factorization.

18731060136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235 (or 2213 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 18731060136 in words is "eighteen billion, seven hundred thirty-one million, sixty thousand, one hundred thirty-six".