18729456379 has 4 divisors (see below), whose sum is σ = 19165025176. Its totient is φ = 18293887584.

The previous prime is 18729456373. The next prime is 18729456413. The reversal of 18729456379 is 97365492781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97365492781 = 1213 ⋅80268337.

It is a cyclic number.

It is not a de Polignac number, because 18729456379 - 2¹³ = 18729448187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18729456373) 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, 217784334 + ... + 217784419.

It is an arithmetic number, because the mean of its divisors is an integer number (4791256294).

Almost surely, 2^18729456379 is an apocalyptic number.

18729456379 is a deficient number, since it is larger than the sum of its proper divisors (435568797).

18729456379 is an equidigital number, since it uses as much as digits as its factorization.

18729456379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435568796.

The product of its digits is 22861440, while the sum is 61.

The spelling of 18729456379 in words is "eighteen billion, seven hundred twenty-nine million, four hundred fifty-six thousand, three hundred seventy-nine".