20216239019 has 2 divisors, whose sum is σ = 20216239020. Its totient is φ = 20216239018.

The previous prime is 20216239007. The next prime is 20216239049. The reversal of 20216239019 is 91093261202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20216239019 - 2⁴ = 20216239003 is a prime.

It is a super-2 number, since 2×20216239019² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20216239019.

It is not a weakly prime, because it can be changed into another prime (20216239049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10108119509 + 10108119510.

It is an arithmetic number, because the mean of its divisors is an integer number (10108119510).

Almost surely, 2^20216239019 is an apocalyptic number.

20216239019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20216239019 is an equidigital number, since it uses as much as digits as its factorization.

20216239019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 20216239019 in words is "twenty billion, two hundred sixteen million, two hundred thirty-nine thousand, nineteen".