18880718005 has 4 divisors (see below), whose sum is σ = 22656861612. Its totient is φ = 15104574400.

The previous prime is 18880717993. The next prime is 18880718023. The reversal of 18880718005 is 50081708881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50081708881 = 61 ⋅821011621.

It can be written as a sum of positive squares in 2 ways, for example, as 2102956164 + 16777761841 = 45858^2 + 129529^2 .

It is not a de Polignac number, because 18880718005 - 2¹¹ = 18880715957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888071796 + ... + 1888071805.

It is an arithmetic number, because the mean of its divisors is an integer number (5664215403).

Almost surely, 2^18880718005 is an apocalyptic number.

It is an amenable number.

18880718005 is a deficient number, since it is larger than the sum of its proper divisors (3776143607).

18880718005 is an equidigital number, since it uses as much as digits as its factorization.

18880718005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776143606.

The product of its (nonzero) digits is 143360, while the sum is 46.

The spelling of 18880718005 in words is "eighteen billion, eight hundred eighty million, seven hundred eighteen thousand, five".