19009512619 has 2 divisors, whose sum is σ = 19009512620. Its totient is φ = 19009512618.

The previous prime is 19009512617. The next prime is 19009512637. The reversal of 19009512619 is 91621590091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19009512619 - 2¹ = 19009512617 is a prime.

It is a super-2 number, since 2×19009512619² (a number of 21 digits) contains 22 as substring.

Together with 19009512617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19009512617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9504756309 + 9504756310.

It is an arithmetic number, because the mean of its divisors is an integer number (9504756310).

Almost surely, 2^19009512619 is an apocalyptic number.

19009512619 is a deficient number, since it is larger than the sum of its proper divisors (1).

19009512619 is an equidigital number, since it uses as much as digits as its factorization.

19009512619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 43.

The spelling of 19009512619 in words is "nineteen billion, nine million, five hundred twelve thousand, six hundred nineteen".