20021011019 has 2 divisors, whose sum is σ = 20021011020. Its totient is φ = 20021011018.

The previous prime is 20021011007. The next prime is 20021011033. The reversal of 20021011019 is 91011012002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021011019 is a prime.

It is a super-2 number, since 2×20021011019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20021010988 and 20021011006.

It is not a weakly prime, because it can be changed into another prime (20021011069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010505509 + 10010505510.

It is an arithmetic number, because the mean of its divisors is an integer number (10010505510).

Almost surely, 2^20021011019 is an apocalyptic number.

20021011019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021011019 is an equidigital number, since it uses as much as digits as its factorization.

20021011019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 20021011019 in words is "twenty billion, twenty-one million, eleven thousand, nineteen".