16002927821 has 4 divisors (see below), whose sum is σ = 16845187200. Its totient is φ = 15160668444.

The previous prime is 16002927791. The next prime is 16002927827. The reversal of 16002927821 is 12872920061.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16002927821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16002927827) 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, 421129661 + ... + 421129698.

It is an arithmetic number, because the mean of its divisors is an integer number (4211296800).

Almost surely, 2^16002927821 is an apocalyptic number.

It is an amenable number.

16002927821 is a deficient number, since it is larger than the sum of its proper divisors (842259379).

16002927821 is an equidigital number, since it uses as much as digits as its factorization.

16002927821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842259378.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 16002927821 in words is "sixteen billion, two million, nine hundred twenty-seven thousand, eight hundred twenty-one".