18750581136 has 400 divisors, whose sum is σ = 65132243968. Its totient is φ = 5094835200.

The previous prime is 18750581123. The next prime is 18750581141. The reversal of 18750581136 is 63118505781.

18750581136 is a `hidden beast` number, since 1 + 8 + 7 + 50 + 581 + 13 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18750581091 and 18750581100.

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 79 ways as a sum of consecutive naturals, for example, 17154606 + ... + 17155698.

Almost surely, 2^18750581136 is an apocalyptic number.

18750581136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18750581136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32566121984).

18750581136 is an abundant number, since it is smaller than the sum of its proper divisors (46381662832).

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

18750581136 is a wasteful number, since it uses less digits than its factorization.

18750581136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1197 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 18750581136 in words is "eighteen billion, seven hundred fifty million, five hundred eighty-one thousand, one hundred thirty-six".