18927966893 has 8 divisors (see below), whose sum is σ = 20939518656. Its totient is φ = 16964886400.

The previous prime is 18927966881. The next prime is 18927966899. The reversal of 18927966893 is 39866972981.

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

It is a de Polignac number, because none of the positive numbers 2^k-18927966893 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 (18927966899) by changing a digit.

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, 12116996 + ... + 12118557.

It is an arithmetic number, because the mean of its divisors is an integer number (2617439832).

Almost surely, 2^18927966893 is an apocalyptic number.

It is an amenable number.

18927966893 is a deficient number, since it is larger than the sum of its proper divisors (2011551763).

18927966893 is a wasteful number, since it uses less digits than its factorization.

18927966893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24235635.

The product of its digits is 70543872, while the sum is 68.

The spelling of 18927966893 in words is "eighteen billion, nine hundred twenty-seven million, nine hundred sixty-six thousand, eight hundred ninety-three".