18895679999 has 8 divisors (see below), whose sum is σ = 21596023968. Its totient is φ = 16195576320.

The previous prime is 18895679983. The next prime is 18895680007. The reversal of 18895679999 is 99997659881.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18895679999 - 2⁴ = 18895679983 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 (18895675999) 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 7 ways as a sum of consecutive naturals, for example, 164339 + ... + 254555.

It is an arithmetic number, because the mean of its divisors is an integer number (2699502996).

Almost surely, 2^18895679999 is an apocalyptic number.

18895679999 is a deficient number, since it is larger than the sum of its proper divisors (2700343969).

18895679999 is an equidigital number, since it uses as much as digits as its factorization.

18895679999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120145.

The product of its digits is 793618560, while the sum is 80.

The spelling of 18895679999 in words is "eighteen billion, eight hundred ninety-five million, six hundred seventy-nine thousand, nine hundred ninety-nine".