19090918087 has 2 divisors, whose sum is σ = 19090918088. Its totient is φ = 19090918086.

The previous prime is 19090918073. The next prime is 19090918117. The reversal of 19090918087 is 78081909091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19090918087 - 2²⁷ = 18956700359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19090916087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9545459043 + 9545459044.

It is an arithmetic number, because the mean of its divisors is an integer number (9545459044).

Almost surely, 2^19090918087 is an apocalyptic number.

19090918087 is a deficient number, since it is larger than the sum of its proper divisors (1).

19090918087 is an equidigital number, since it uses as much as digits as its factorization.

19090918087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 52.

The spelling of 19090918087 in words is "nineteen billion, ninety million, nine hundred eighteen thousand, eighty-seven".