19081313899 has 2 divisors, whose sum is σ = 19081313900. Its totient is φ = 19081313898.

The previous prime is 19081313891. The next prime is 19081313917. The reversal of 19081313899 is 99831318091.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19081313899 - 2³ = 19081313891 is a prime.

It is a super-2 number, since 2×19081313899² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19081313891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9540656949 + 9540656950.

It is an arithmetic number, because the mean of its divisors is an integer number (9540656950).

Almost surely, 2^19081313899 is an apocalyptic number.

19081313899 is a deficient number, since it is larger than the sum of its proper divisors (1).

19081313899 is an equidigital number, since it uses as much as digits as its factorization.

19081313899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 52.

The spelling of 19081313899 in words is "nineteen billion, eighty-one million, three hundred thirteen thousand, eight hundred ninety-nine".