18679849917553 has 8 divisors (see below), whose sum is σ = 20386258322976. Its totient is φ = 16974814884000.

The previous prime is 18679849917541. The next prime is 18679849917563. The reversal of 18679849917553 is 35571994897681.

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

It is a cyclic number.

It is not a de Polignac number, because 18679849917553 - 2⁹ = 18679849917041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18679849917563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343314523 + ... + 343368928.

It is an arithmetic number, because the mean of its divisors is an integer number (2548282290372).

Almost surely, 2^{18679849917553} is an apocalyptic number.

It is an amenable number.

18679849917553 is a deficient number, since it is larger than the sum of its proper divisors (1706408405423).

18679849917553 is a wasteful number, since it uses less digits than its factorization.

18679849917553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686685935.

The product of its digits is 4115059200, while the sum is 82.

The spelling of 18679849917553 in words is "eighteen trillion, six hundred seventy-nine billion, eight hundred forty-nine million, nine hundred seventeen thousand, five hundred fifty-three".