16079230821 has 4 divisors (see below), whose sum is σ = 21438974432. Its totient is φ = 10719487212.

The previous prime is 16079230799. The next prime is 16079230897. The reversal of 16079230821 is 12803297061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12803297061 = 3 ⋅4267765687.

It is not a de Polignac number, because 16079230821 - 2²³ = 16070842213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16079230821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16079230021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2679871801 + ... + 2679871806.

It is an arithmetic number, because the mean of its divisors is an integer number (5359743608).

Almost surely, 2^16079230821 is an apocalyptic number.

It is an amenable number.

16079230821 is a deficient number, since it is larger than the sum of its proper divisors (5359743611).

16079230821 is an equidigital number, since it uses as much as digits as its factorization.

16079230821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359743610.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 16079230821 in words is "sixteen billion, seventy-nine million, two hundred thirty thousand, eight hundred twenty-one".