18126805379 has 4 divisors (see below), whose sum is σ = 18914927376. Its totient is φ = 17338683384.

The previous prime is 18126805369. The next prime is 18126805381. The reversal of 18126805379 is 97350862181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97350862181 = 67 ⋅1452997943.

It is a cyclic number.

It is not a de Polignac number, because 18126805379 - 2¹² = 18126801283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18126805369) 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, 394060964 + ... + 394061009.

It is an arithmetic number, because the mean of its divisors is an integer number (4728731844).

Almost surely, 2^18126805379 is an apocalyptic number.

18126805379 is a deficient number, since it is larger than the sum of its proper divisors (788121997).

18126805379 is an equidigital number, since it uses as much as digits as its factorization.

18126805379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788121996.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 18126805379 in words is "eighteen billion, one hundred twenty-six million, eight hundred five thousand, three hundred seventy-nine".