18579455911 has 4 divisors (see below), whose sum is σ = 18581884992. Its totient is φ = 18577026832.

The previous prime is 18579455903. The next prime is 18579455929. The reversal of 18579455911 is 11955497581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11955497581 = 26113 ⋅457837.

It is a cyclic number.

It is not a de Polignac number, because 18579455911 - 2³ = 18579455903 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 (18579155911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203031 + ... + 1218376.

It is an arithmetic number, because the mean of its divisors is an integer number (4645471248).

Almost surely, 2^18579455911 is an apocalyptic number.

18579455911 is a deficient number, since it is larger than the sum of its proper divisors (2429081).

18579455911 is an equidigital number, since it uses as much as digits as its factorization.

18579455911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429080.

The product of its digits is 2268000, while the sum is 55.

The spelling of 18579455911 in words is "eighteen billion, five hundred seventy-nine million, four hundred fifty-five thousand, nine hundred eleven".