20180663328 has 72 divisors (see below), whose sum is σ = 61623111312. Its totient is φ = 5765902464.

The previous prime is 20180663323. The next prime is 20180663357. The reversal of 20180663328 is 82336608102.

It is not an unprimeable number, because it can be changed into a prime (20180663323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2140350 + ... + 2149757.

It is an arithmetic number, because the mean of its divisors is an integer number (855876546).

Almost surely, 2^20180663328 is an apocalyptic number.

20180663328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20180663328 is an abundant number, since it is smaller than the sum of its proper divisors (41442447984).

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

20180663328 is a wasteful number, since it uses less digits than its factorization.

20180663328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290134 (or 4290119 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 20180663328 in words is "twenty billion, one hundred eighty million, six hundred sixty-three thousand, three hundred twenty-eight".