20698039 has 2 divisors, whose sum is σ = 20698040. Its totient is φ = 20698038.

The previous prime is 20698019. The next prime is 20698043. The reversal of 20698039 is 93089602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20698039 - 2¹⁷ = 20566967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20697989 and 20698007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20698019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10349019 + 10349020.

It is an arithmetic number, because the mean of its divisors is an integer number (10349020).

Almost surely, 2^20698039 is an apocalyptic number.

20698039 is a deficient number, since it is larger than the sum of its proper divisors (1).

20698039 is an equidigital number, since it uses as much as digits as its factorization.

20698039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 20698039 is about 4549.5097538086. The cubic root of 20698039 is about 274.5636672812.

The spelling of 20698039 in words is "twenty million, six hundred ninety-eight thousand, thirty-nine".