19085029499 has 2 divisors, whose sum is σ = 19085029500. Its totient is φ = 19085029498.

The previous prime is 19085029489. The next prime is 19085029559. The reversal of 19085029499 is 99492058091.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19085029499 is a prime.

It is not a weakly prime, because it can be changed into another prime (19085029409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9542514749 + 9542514750.

It is an arithmetic number, because the mean of its divisors is an integer number (9542514750).

Almost surely, 2^19085029499 is an apocalyptic number.

19085029499 is a deficient number, since it is larger than the sum of its proper divisors (1).

19085029499 is an equidigital number, since it uses as much as digits as its factorization.

19085029499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2099520, while the sum is 56.

The spelling of 19085029499 in words is "nineteen billion, eighty-five million, twenty-nine thousand, four hundred ninety-nine".