20012443019 has 2 divisors, whose sum is σ = 20012443020. Its totient is φ = 20012443018.

The previous prime is 20012442941. The next prime is 20012443039. The reversal of 20012443019 is 91034421002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20012443019 - 2¹² = 20012438923 is a prime.

It is a super-2 number, since 2×20012443019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20012443039) 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, 10006221509 + 10006221510.

It is an arithmetic number, because the mean of its divisors is an integer number (10006221510).

Almost surely, 2^20012443019 is an apocalyptic number.

20012443019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012443019 is an equidigital number, since it uses as much as digits as its factorization.

20012443019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 20012443019 in words is "twenty billion, twelve million, four hundred forty-three thousand, nineteen".