16818351550 has 96 divisors (see below), whose sum is σ = 42001311744. Its totient is φ = 4838832000.

The previous prime is 16818351547. The next prime is 16818351569. The reversal of 16818351550 is 5515381861.

It is a junction number, because it is equal to n+sod(n) for n = 16818351497 and 16818351506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117966 + ... + 218065.

It is an arithmetic number, because the mean of its divisors is an integer number (437513664).

Almost surely, 2^16818351550 is an apocalyptic number.

16818351550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16818351550 is an abundant number, since it is smaller than the sum of its proper divisors (25182960194).

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

16818351550 is a wasteful number, since it uses less digits than its factorization.

16818351550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336074 (or 336069 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 43.

The spelling of 16818351550 in words is "sixteen billion, eight hundred eighteen million, three hundred fifty-one thousand, five hundred fifty".