16718885500 has 48 divisors (see below), whose sum is σ = 36697752000. Its totient is φ = 6653908800.

The previous prime is 16718885489. The next prime is 16718885503. The reversal of 16718885500 is 558881761.

It is a happy number.

It is a super-2 number, since 2×16718885500² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16718885503) 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 15 ways as a sum of consecutive naturals, for example, 15486 + ... + 183514.

It is an arithmetic number, because the mean of its divisors is an integer number (764536500).

Almost surely, 2^16718885500 is an apocalyptic number.

16718885500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16718885500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18348876000).

16718885500 is an abundant number, since it is smaller than the sum of its proper divisors (19978866500).

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

16718885500 is a wasteful number, since it uses less digits than its factorization.

16718885500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168247 (or 168235 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 49.

The spelling of 16718885500 in words is "sixteen billion, seven hundred eighteen million, eight hundred eighty-five thousand, five hundred".