18052625081 has 4 divisors (see below), whose sum is σ = 18270126672. Its totient is φ = 17835123492.

The previous prime is 18052625069. The next prime is 18052625083.

18052625081 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18052625081 is a prime.

It is a super-2 number, since 2×18052625081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18052625083) 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, 108750671 + ... + 108750836.

It is an arithmetic number, because the mean of its divisors is an integer number (4567531668).

Almost surely, 2^18052625081 is an apocalyptic number.

It is an amenable number.

18052625081 is a deficient number, since it is larger than the sum of its proper divisors (217501591).

18052625081 is an equidigital number, since it uses as much as digits as its factorization.

18052625081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217501590.

The product of its (nonzero) digits is 38400, while the sum is 38.

The spelling of 18052625081 in words is "eighteen billion, fifty-two million, six hundred twenty-five thousand, eighty-one".