1000000019899 has 2 divisors, whose sum is σ = 1000000019900. Its totient is φ = 1000000019898.

The previous prime is 1000000019897. The next prime is 1000000019939. The reversal of 1000000019899 is 9989100000001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000000019899 - 2¹ = 1000000019897 is a prime.

Together with 1000000019897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1000000019897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000009949 + 500000009950.

It is an arithmetic number, because the mean of its divisors is an integer number (500000009950).

Almost surely, 2^{1000000019899} is an apocalyptic number.

1000000019899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000000019899 is an equidigital number, since it uses as much as digits as its factorization.

1000000019899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 1000000019899 in words is "one trillion, nineteen thousand, eight hundred ninety-nine".