18820534348 has 72 divisors (see below), whose sum is σ = 41593595904. Its totient is φ = 7239117600.

The previous prime is 18820534333. The next prime is 18820534349. The reversal of 18820534348 is 84343502881.

It is a junction number, because it is equal to n+sod(n) for n = 18820534298 and 18820534307.

It is not an unprimeable number, because it can be changed into a prime (18820534349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1917333 + ... + 1927123.

It is an arithmetic number, because the mean of its divisors is an integer number (577688832).

Almost surely, 2^18820534348 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18820534348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20796797952).

18820534348 is an abundant number, since it is smaller than the sum of its proper divisors (22773061556).

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

18820534348 is a wasteful number, since it uses less digits than its factorization.

18820534348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9971 (or 9890 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 46.

The spelling of 18820534348 in words is "eighteen billion, eight hundred twenty million, five hundred thirty-four thousand, three hundred forty-eight".