16821415236 has 48 divisors (see below), whose sum is σ = 41329632960. Its totient is φ = 5310241920.

The previous prime is 16821415213. The next prime is 16821415279. The reversal of 16821415236 is 63251412861.

16821415236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 16821415194 and 16821415203.

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 15 ways as a sum of consecutive naturals, for example, 778450 + ... + 799766.

It is an arithmetic number, because the mean of its divisors is an integer number (861034020).

Almost surely, 2^16821415236 is an apocalyptic number.

It is an amenable number.

16821415236 is an abundant number, since it is smaller than the sum of its proper divisors (24508217724).

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

16821415236 is a wasteful number, since it uses less digits than its factorization.

16821415236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24804 (or 24802 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The spelling of 16821415236 in words is "sixteen billion, eight hundred twenty-one million, four hundred fifteen thousand, two hundred thirty-six".