18282014521 has 3 divisors (see below), whose sum is σ = 18282149733. Its totient is φ = 18281879310.

The previous prime is 18282014501. The next prime is 18282014581. The reversal of 18282014521 is 12541028281.

The square root of 18282014521 is 135211.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12541028281 = 82267 ⋅152443.

It is not a de Polignac number, because 18282014521 - 2²⁵ = 18248460089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18282014501) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 67606 + ... + 202816.

It is an arithmetic number, because the mean of its divisors is an integer number (6094049911).

Almost surely, 2^18282014521 is an apocalyptic number.

18282014521 is the 135211-st square number.

18282014521 is the 67606-th centered octagonal number.

It is an amenable number.

18282014521 is a deficient number, since it is larger than the sum of its proper divisors (135212).

18282014521 is an frugal number, since it uses more digits than its factorization.

18282014521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270422 (or 135211 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 34.

The spelling of 18282014521 in words is "eighteen billion, two hundred eighty-two million, fourteen thousand, five hundred twenty-one".