18973278435797 has 8 divisors (see below), whose sum is σ = 21927384388800. Its totient is φ = 16080081884064.

The previous prime is 18973278435773. The next prime is 18973278435821. The reversal of 18973278435797 is 79753487237981.

It is an interprime number because it is at equal distance from previous prime (18973278435773) and next prime (18973278435821).

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 18973278435797 - 2⁸ = 18973278435541 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 (18973278435707) 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, 15227349647 + ... + 15227350892.

It is an arithmetic number, because the mean of its divisors is an integer number (2740923048600).

Almost surely, 2^{18973278435797} is an apocalyptic number.

It is an amenable number.

18973278435797 is a deficient number, since it is larger than the sum of its proper divisors (2954105953003).

18973278435797 is an equidigital number, since it uses as much as digits as its factorization.

18973278435797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30454700635.

The product of its digits is 4480842240, while the sum is 80.

The spelling of 18973278435797 in words is "eighteen trillion, nine hundred seventy-three billion, two hundred seventy-eight million, four hundred thirty-five thousand, seven hundred ninety-seven".