16961824818 has 64 divisors (see below), whose sum is σ = 39725347200. Its totient is φ = 5349810240.

The previous prime is 16961824807. The next prime is 16961824823. The reversal of 16961824818 is 81842816961.

It is a happy number.

16961824818 is a `hidden beast` number, since 1 + 6 + 9 + 618 + 2 + 4 + 8 + 18 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 865488 + ... + 884868.

It is an arithmetic number, because the mean of its divisors is an integer number (620708550).

Almost surely, 2^16961824818 is an apocalyptic number.

16961824818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16961824818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19862673600).

16961824818 is an abundant number, since it is smaller than the sum of its proper divisors (22763522382).

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

16961824818 is a wasteful number, since it uses less digits than its factorization.

16961824818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20264 (or 20258 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The spelling of 16961824818 in words is "sixteen billion, nine hundred sixty-one million, eight hundred twenty-four thousand, eight hundred eighteen".