18052840885 has 4 divisors (see below), whose sum is σ = 21663409068. Its totient is φ = 14442272704.

The previous prime is 18052840877. The next prime is 18052840907. The reversal of 18052840885 is 58804825081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14149340401 + 3903500484 = 118951^2 + 62478^2 .

It is a cyclic number.

It is not a de Polignac number, because 18052840885 - 2³ = 18052840877 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 1805284084 + ... + 1805284093.

It is an arithmetic number, because the mean of its divisors is an integer number (5415852267).

Almost surely, 2^18052840885 is an apocalyptic number.

It is an amenable number.

18052840885 is a deficient number, since it is larger than the sum of its proper divisors (3610568183).

18052840885 is an equidigital number, since it uses as much as digits as its factorization.

18052840885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610568182.

The product of its (nonzero) digits is 819200, while the sum is 49.

The spelling of 18052840885 in words is "eighteen billion, fifty-two million, eight hundred forty thousand, eight hundred eighty-five".