16304561020 has 96 divisors (see below), whose sum is σ = 38436685056. Its totient is φ = 5758118400.

The previous prime is 16304561017. The next prime is 16304561033. The reversal of 16304561020 is 2016540361.

It is a self number, because there is not a number n which added to its sum of digits gives 16304561020.

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 31 ways as a sum of consecutive naturals, for example, 2043559 + ... + 2051521.

It is an arithmetic number, because the mean of its divisors is an integer number (400382136).

Almost surely, 2^16304561020 is an apocalyptic number.

16304561020 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 16304561020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19218342528).

16304561020 is an abundant number, since it is smaller than the sum of its proper divisors (22132124036).

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

16304561020 is a wasteful number, since it uses less digits than its factorization.

16304561020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251 (or 8249 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 16304561020 in words is "sixteen billion, three hundred four million, five hundred sixty-one thousand, twenty".