19488679999 has 16 divisors (see below), whose sum is σ = 20409903360. Its totient is φ = 18573762240.

The previous prime is 19488679967. The next prime is 19488680011. The reversal of 19488679999 is 99997688491.

It is a happy number.

It is not a de Polignac number, because 19488679999 - 2⁵ = 19488679967 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 (19488679939) 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, 9328147 + ... + 9330235.

It is an arithmetic number, because the mean of its divisors is an integer number (1275618960).

Almost surely, 2^19488679999 is an apocalyptic number.

19488679999 is a deficient number, since it is larger than the sum of its proper divisors (921223361).

19488679999 is a wasteful number, since it uses less digits than its factorization.

19488679999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390.

The product of its digits is 634894848, while the sum is 79.

The spelling of 19488679999 in words is "nineteen billion, four hundred eighty-eight million, six hundred seventy-nine thousand, nine hundred ninety-nine".