19309117927 has 12 divisors (see below), whose sum is σ = 21256661160. Its totient is φ = 17526790160.

The previous prime is 19309117921. The next prime is 19309117943. The reversal of 19309117927 is 72971190391.

It is not a de Polignac number, because 19309117927 - 2¹⁹ = 19308593639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19309117921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43177 + ... + 201202.

It is an arithmetic number, because the mean of its divisors is an integer number (1771388430).

Almost surely, 2^19309117927 is an apocalyptic number.

19309117927 is a deficient number, since it is larger than the sum of its proper divisors (1947543233).

19309117927 is a wasteful number, since it uses less digits than its factorization.

19309117927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245054 (or 245043 counting only the distinct ones).

The product of its (nonzero) digits is 214326, while the sum is 49.

The spelling of 19309117927 in words is "nineteen billion, three hundred nine million, one hundred seventeen thousand, nine hundred twenty-seven".