20016839 has 2 divisors, whose sum is σ = 20016840. Its totient is φ = 20016838.

The previous prime is 20016833. The next prime is 20016847. The reversal of 20016839 is 93861002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20016839 - 2¹² = 20012743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20016833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008419 + 10008420.

It is an arithmetic number, because the mean of its divisors is an integer number (10008420).

Almost surely, 2^20016839 is an apocalyptic number.

20016839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20016839 is an equidigital number, since it uses as much as digits as its factorization.

20016839 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 20016839 is about 4474.0182163241. The cubic root of 20016839 is about 271.5179204199.

The spelling of 20016839 in words is "twenty million, sixteen thousand, eight hundred thirty-nine".