18520705383330 has 16 divisors (see below), whose sum is σ = 44449692920064. Its totient is φ = 4938854768880.

The previous prime is 18520705383311. The next prime is 18520705383359. The reversal of 18520705383330 is 3338350702581.

It is a super-2 number, since 2×18520705383330² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18520705383330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308678423026 + ... + 308678423085.

It is an arithmetic number, because the mean of its divisors is an integer number (2778105807504).

Almost surely, 2^{18520705383330} is an apocalyptic number.

18520705383330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18520705383330 is an abundant number, since it is smaller than the sum of its proper divisors (25928987536734).

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

18520705383330 is a wasteful number, since it uses less digits than its factorization.

18520705383330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617356846121.

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 18520705383330 in words is "eighteen trillion, five hundred twenty billion, seven hundred five million, three hundred eighty-three thousand, three hundred thirty".