19138612907 has 2 divisors, whose sum is σ = 19138612908. Its totient is φ = 19138612906.

The previous prime is 19138612849. The next prime is 19138612943. The reversal of 19138612907 is 70921683191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19138612907 - 2²⁰ = 19137564331 is a prime.

It is not a weakly prime, because it can be changed into another prime (19138612967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9569306453 + 9569306454.

It is an arithmetic number, because the mean of its divisors is an integer number (9569306454).

Almost surely, 2^19138612907 is an apocalyptic number.

19138612907 is a deficient number, since it is larger than the sum of its proper divisors (1).

19138612907 is an equidigital number, since it uses as much as digits as its factorization.

19138612907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 19138612907 in words is "nineteen billion, one hundred thirty-eight million, six hundred twelve thousand, nine hundred seven".