19191110009291 has 16 divisors (see below), whose sum is σ = 21634739774208. Its totient is φ = 16872011772000.

The previous prime is 19191110009249. The next prime is 19191110009329. The reversal of 19191110009291 is 19290001119191.

It is not a de Polignac number, because 19191110009291 - 2¹⁰ = 19191110008267 is a prime.

It is a super-2 number, since 2×19191110009291² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19191110009191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200809511 + ... + 200905056.

It is an arithmetic number, because the mean of its divisors is an integer number (1352171235888).

Almost surely, 2^{19191110009291} is an apocalyptic number.

19191110009291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19191110009291 is a deficient number, since it is larger than the sum of its proper divisors (2443629764917).

19191110009291 is a wasteful number, since it uses less digits than its factorization.

19191110009291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401714722.

The product of its (nonzero) digits is 13122, while the sum is 44.

The spelling of 19191110009291 in words is "nineteen trillion, one hundred ninety-one billion, one hundred ten million, nine thousand, two hundred ninety-one".