16821270803 has 2 divisors, whose sum is σ = 16821270804. Its totient is φ = 16821270802.

The previous prime is 16821270773. The next prime is 16821270821. The reversal of 16821270803 is 30807212861.

It is a strong prime.

It is an emirp because it is prime and its reverse (30807212861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16821270803 - 2¹⁴ = 16821254419 is a prime.

It is not a weakly prime, because it can be changed into another prime (16821279803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8410635401 + 8410635402.

It is an arithmetic number, because the mean of its divisors is an integer number (8410635402).

Almost surely, 2^16821270803 is an apocalyptic number.

16821270803 is a deficient number, since it is larger than the sum of its proper divisors (1).

16821270803 is an equidigital number, since it uses as much as digits as its factorization.

16821270803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 16821270803 in words is "sixteen billion, eight hundred twenty-one million, two hundred seventy thousand, eight hundred three".