16221386039 has 2 divisors, whose sum is σ = 16221386040. Its totient is φ = 16221386038.

The previous prime is 16221385993. The next prime is 16221386047. The reversal of 16221386039 is 93068312261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16221386039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16221385987 and 16221386005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16221386099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110693019 + 8110693020.

It is an arithmetic number, because the mean of its divisors is an integer number (8110693020).

Almost surely, 2^16221386039 is an apocalyptic number.

16221386039 is a deficient number, since it is larger than the sum of its proper divisors (1).

16221386039 is an equidigital number, since it uses as much as digits as its factorization.

16221386039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 16221386039 in words is "sixteen billion, two hundred twenty-one million, three hundred eighty-six thousand, thirty-nine".