20836019 has 2 divisors, whose sum is σ = 20836020. Its totient is φ = 20836018.

The previous prime is 20836009. The next prime is 20836043. The reversal of 20836019 is 91063802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20836019 is a prime.

It is a super-2 number, since 2×20836019² = 868279375536722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20835982 and 20836000.

It is not a weakly prime, because it can be changed into another prime (20836009) 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, 10418009 + 10418010.

It is an arithmetic number, because the mean of its divisors is an integer number (10418010).

Almost surely, 2^20836019 is an apocalyptic number.

20836019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20836019 is an equidigital number, since it uses as much as digits as its factorization.

20836019 is an odious number, because the sum of its binary digits is odd.

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

The square root of 20836019 is about 4564.6488364386. The cubic root of 20836019 is about 275.1724274011.

The spelling of 20836019 in words is "twenty million, eight hundred thirty-six thousand, nineteen".