18794479373 has 4 divisors (see below), whose sum is σ = 18842794620. Its totient is φ = 18746164128.

The previous prime is 18794479321. The next prime is 18794479391. The reversal of 18794479373 is 37397449781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10636415689 + 8158063684 = 103133^2 + 90322^2 .

It is a cyclic number.

It is not a de Polignac number, because 18794479373 - 2⁸ = 18794479117 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 (18794479393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24157040 + ... + 24157817.

It is an arithmetic number, because the mean of its divisors is an integer number (4710698655).

Almost surely, 2^18794479373 is an apocalyptic number.

It is an amenable number.

18794479373 is a deficient number, since it is larger than the sum of its proper divisors (48315247).

18794479373 is an equidigital number, since it uses as much as digits as its factorization.

18794479373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48315246.

The product of its digits is 32006016, while the sum is 62.

The spelling of 18794479373 in words is "eighteen billion, seven hundred ninety-four million, four hundred seventy-nine thousand, three hundred seventy-three".