20202021019 has 2 divisors, whose sum is σ = 20202021020. Its totient is φ = 20202021018.

The previous prime is 20202021017. The next prime is 20202021071. The reversal of 20202021019 is 91012020202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20202021019 - 2¹ = 20202021017 is a prime.

It is a super-2 number, since 2×20202021019² (a number of 21 digits) contains 22 as substring.

Together with 20202021017, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20202020987 and 20202021005.

It is not a weakly prime, because it can be changed into another prime (20202021017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101010509 + 10101010510.

It is an arithmetic number, because the mean of its divisors is an integer number (10101010510).

Almost surely, 2^20202021019 is an apocalyptic number.

20202021019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202021019 is an equidigital number, since it uses as much as digits as its factorization.

20202021019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 20202021019 in words is "twenty billion, two hundred two million, twenty-one thousand, nineteen".