18512522352 has 80 divisors (see below), whose sum is σ = 53184929280. Its totient is φ = 6165367488.

The previous prime is 18512522333. The next prime is 18512522393. The reversal of 18512522352 is 25322521581.

18512522352 is a `hidden beast` number, since 1 + 8 + 51 + 252 + 2 + 352 = 666.

It is a super-2 number, since 2×18512522352² (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 15 ways as a sum of consecutive naturals, for example, 483993 + ... + 520839.

It is an arithmetic number, because the mean of its divisors is an integer number (664811616).

Almost surely, 2^18512522352 is an apocalyptic number.

18512522352 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 18512522352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26592464640).

18512522352 is an abundant number, since it is smaller than the sum of its proper divisors (34672406928).

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

18512522352 is a wasteful number, since it uses less digits than its factorization.

18512522352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38027 (or 38015 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The spelling of 18512522352 in words is "eighteen billion, five hundred twelve million, five hundred twenty-two thousand, three hundred fifty-two".