19464192009 has 12 divisors (see below), whose sum is σ = 28121564016. Its totient is φ = 12973072632.

The previous prime is 19464191933. The next prime is 19464192017. The reversal of 19464192009 is 90029146491.

It is not a de Polignac number, because 19464192009 - 2⁷ = 19464191881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19464192019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213927 + ... + 291020.

It is an arithmetic number, because the mean of its divisors is an integer number (2343463668).

Almost surely, 2^19464192009 is an apocalyptic number.

It is an amenable number.

19464192009 is a deficient number, since it is larger than the sum of its proper divisors (8657372007).

19464192009 is a wasteful number, since it uses less digits than its factorization.

19464192009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509236 (or 509233 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 19464192009 in words is "nineteen billion, four hundred sixty-four million, one hundred ninety-two thousand, nine".