11309421816 has 384 divisors, whose sum is σ = 40232125440. Its totient is φ = 2805960960.

The previous prime is 11309421779. The next prime is 11309421841. The reversal of 11309421816 is 61812490311.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15428586 + ... + 15429318.

It is an arithmetic number, because the mean of its divisors is an integer number (104771160).

Almost surely, 2^11309421816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11309421816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20116062720).

11309421816 is an abundant number, since it is smaller than the sum of its proper divisors (28922703624).

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

11309421816 is a wasteful number, since it uses less digits than its factorization.

11309421816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 11309421816 in words is "eleven billion, three hundred nine million, four hundred twenty-one thousand, eight hundred sixteen".