18885535056 has 120 divisors (see below), whose sum is σ = 53222278824. Its totient is φ = 6251397120.

The previous prime is 18885535033. The next prime is 18885535057. The reversal of 18885535056 is 65053558881.

It is a happy number.

18885535056 is a `hidden beast` number, since 1 + 8 + 8 + 85 + 53 + 505 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5106531600 + 13779003456 = 71460^2 + 117384^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18885534993 and 18885535011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18885535057) 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, 19329640 + ... + 19330616.

Almost surely, 2^18885535056 is an apocalyptic number.

18885535056 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 18885535056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26611139412).

18885535056 is an abundant number, since it is smaller than the sum of its proper divisors (34336743768).

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

18885535056 is a wasteful number, since it uses less digits than its factorization.

18885535056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 54.

The spelling of 18885535056 in words is "eighteen billion, eight hundred eighty-five million, five hundred thirty-five thousand, fifty-six".