20502019 has 2 divisors, whose sum is σ = 20502020. Its totient is φ = 20502018.

The previous prime is 20501989. The next prime is 20502023. The reversal of 20502019 is 91020502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20502019 - 2¹¹ = 20499971 is a prime.

It is a super-2 number, since 2×20502019² = 840665566152722, 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 = 20501987 and 20502005.

It is not a weakly prime, because it can be changed into another prime (20502049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251009 + 10251010.

It is an arithmetic number, because the mean of its divisors is an integer number (10251010).

Almost surely, 2^20502019 is an apocalyptic number.

20502019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502019 is an equidigital number, since it uses as much as digits as its factorization.

20502019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20502019 is about 4527.9155248304. The cubic root of 20502019 is about 273.6941683293.

The spelling of 20502019 in words is "twenty million, five hundred two thousand, nineteen".