18113830272 has 192 divisors, whose sum is σ = 54991872000. Its totient is φ = 5707238400.

The previous prime is 18113830201. The next prime is 18113830283. The reversal of 18113830272 is 27203831181.

18113830272 is a `hidden beast` number, since 1 + 8 + 1 + 1 + 383 + 0 + 272 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×18113830272² (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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15736897 + ... + 15738047.

It is an arithmetic number, because the mean of its divisors is an integer number (286416000).

Almost surely, 2^18113830272 is an apocalyptic number.

18113830272 is a gapful number since it is divisible by the number (12) 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 18113830272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27495936000).

18113830272 is an abundant number, since it is smaller than the sum of its proper divisors (36878041728).

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

18113830272 is a wasteful number, since it uses less digits than its factorization.

18113830272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

Subtracting 18113830272 from its reverse (27203831181), we obtain a palindrome (9090000909).

The spelling of 18113830272 in words is "eighteen billion, one hundred thirteen million, eight hundred thirty thousand, two hundred seventy-two".