18353576820 has 96 divisors (see below), whose sum is σ = 51790306176. Its totient is φ = 4856320000.

The previous prime is 18353576797. The next prime is 18353576827. The reversal of 18353576820 is 2867535381.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18353576820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18353576827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4229692 + ... + 4234028.

It is an arithmetic number, because the mean of its divisors is an integer number (539482356).

Almost surely, 2^18353576820 is an apocalyptic number.

18353576820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18353576820 is an abundant number, since it is smaller than the sum of its proper divisors (33436729356).

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

18353576820 is a wasteful number, since it uses less digits than its factorization.

18353576820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881 (or 4879 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 18353576820 in words is "eighteen billion, three hundred fifty-three million, five hundred seventy-six thousand, eight hundred twenty".