19678913247 has 32 divisors (see below), whose sum is σ = 30116360704. Its totient is φ = 11196662400.

The previous prime is 19678913237. The next prime is 19678913269. The reversal of 19678913247 is 74231987691.

It is a happy number.

It is not a de Polignac number, because 19678913247 - 2⁴ = 19678913231 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 (19678913237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5508972 + ... + 5512542.

It is an arithmetic number, because the mean of its divisors is an integer number (941136272).

Almost surely, 2^19678913247 is an apocalyptic number.

19678913247 is a deficient number, since it is larger than the sum of its proper divisors (10437447457).

19678913247 is a wasteful number, since it uses less digits than its factorization.

19678913247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639.

The product of its digits is 4572288, while the sum is 57.

The spelling of 19678913247 in words is "nineteen billion, six hundred seventy-eight million, nine hundred thirteen thousand, two hundred forty-seven".