19456378612 has 24 divisors (see below), whose sum is σ = 37511766432. Its totient is φ = 8756244000.

The previous prime is 19456378597. The next prime is 19456378649. The reversal of 19456378612 is 21687365491.

It is a self number, because there is not a number n which added to its sum of digits gives 19456378612.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2184618 + ... + 2193505.

It is an arithmetic number, because the mean of its divisors is an integer number (1562990268).

Almost surely, 2^19456378612 is an apocalyptic number.

It is an amenable number.

19456378612 is a deficient number, since it is larger than the sum of its proper divisors (18055387820).

19456378612 is a wasteful number, since it uses less digits than its factorization.

19456378612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4378239 (or 4378237 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The spelling of 19456378612 in words is "nineteen billion, four hundred fifty-six million, three hundred seventy-eight thousand, six hundred twelve".