18156310128 has 120 divisors (see below), whose sum is σ = 55480120176. Its totient is φ = 5497113600.

The previous prime is 18156310127. The next prime is 18156310157. The reversal of 18156310128 is 82101365181.

18156310128 is a `hidden beast` number, since 1 + 8 + 1 + 5 + 631 + 0 + 12 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 18156310092 and 18156310101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18156310127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2088126 + ... + 2096802.

Almost surely, 2^18156310128 is an apocalyptic number.

18156310128 is a gapful number since it is divisible by the number (18) 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 18156310128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27740060088).

18156310128 is an abundant number, since it is smaller than the sum of its proper divisors (37323810048).

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

18156310128 is a wasteful number, since it uses less digits than its factorization.

18156310128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10023 (or 10014 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 18156310128 in words is "eighteen billion, one hundred fifty-six million, three hundred ten thousand, one hundred twenty-eight".