990000000019 has 2 divisors, whose sum is σ = 990000000020. Its totient is φ = 990000000018.

The previous prime is 990000000007. The next prime is 990000000037. The reversal of 990000000019 is 910000000099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990000000019 - 2²¹ = 989997902867 is a prime.

It is a super-2 number, since 2×990000000019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (990000000089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495000000009 + 495000000010.

It is an arithmetic number, because the mean of its divisors is an integer number (495000000010).

Almost surely, 2^990000000019 is an apocalyptic number.

990000000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

990000000019 is an equidigital number, since it uses as much as digits as its factorization.

990000000019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 28.

The spelling of 990000000019 in words is "nine hundred ninety billion, nineteen", and thus it is an aban number.