20050405019 has 2 divisors, whose sum is σ = 20050405020. Its totient is φ = 20050405018.

The previous prime is 20050404991. The next prime is 20050405031. The reversal of 20050405019 is 91050405002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20050405019 - 2²⁰ = 20049356443 is a prime.

It is a super-2 number, since 2×20050405019² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20050405099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025202509 + 10025202510.

It is an arithmetic number, because the mean of its divisors is an integer number (10025202510).

Almost surely, 2^20050405019 is an apocalyptic number.

20050405019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20050405019 is an equidigital number, since it uses as much as digits as its factorization.

20050405019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 20050405019 in words is "twenty billion, fifty million, four hundred five thousand, nineteen".