18589077479 has 4 divisors (see below), whose sum is σ = 21244659984. Its totient is φ = 15933494976.

The previous prime is 18589077467. The next prime is 18589077497. The reversal of 18589077479 is 97477098581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97477098581 = 43093 ⋅2262017.

It is not a de Polignac number, because 18589077479 - 2⁸ = 18589077223 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 (18589077079) 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, 1327791242 + ... + 1327791255.

It is an arithmetic number, because the mean of its divisors is an integer number (5311164996).

Almost surely, 2^18589077479 is an apocalyptic number.

18589077479 is a deficient number, since it is larger than the sum of its proper divisors (2655582505).

18589077479 is an equidigital number, since it uses as much as digits as its factorization.

18589077479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655582504.

The product of its (nonzero) digits is 35562240, while the sum is 65.

The spelling of 18589077479 in words is "eighteen billion, five hundred eighty-nine million, seventy-seven thousand, four hundred seventy-nine".