16820039 has 2 divisors, whose sum is σ = 16820040. Its totient is φ = 16820038.

The previous prime is 16820017. The next prime is 16820047. The reversal of 16820039 is 93002861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16820039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16819993 and 16820020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16820099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8410019 + 8410020.

It is an arithmetic number, because the mean of its divisors is an integer number (8410020).

Almost surely, 2^16820039 is an apocalyptic number.

16820039 is a deficient number, since it is larger than the sum of its proper divisors (1).

16820039 is an equidigital number, since it uses as much as digits as its factorization.

16820039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 16820039 is about 4101.2240855627. The cubic root of 16820039 is about 256.2176239881.

The spelling of 16820039 in words is "sixteen million, eight hundred twenty thousand, thirty-nine".