18060216481 has 4 divisors (see below), whose sum is σ = 18063994032. Its totient is φ = 18056438932.

The previous prime is 18060216451. The next prime is 18060216487. The reversal of 18060216481 is 18461206081.

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 not a de Polignac number, because 18060216481 - 2⁷ = 18060216353 is a prime.

It is a super-2 number, since 2×18060216481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18060216481.

It is not an unprimeable number, because it can be changed into a prime (18060216487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1881595 + ... + 1891168.

It is an arithmetic number, because the mean of its divisors is an integer number (4515998508).

Almost surely, 2^18060216481 is an apocalyptic number.

It is an amenable number.

18060216481 is a deficient number, since it is larger than the sum of its proper divisors (3777551).

18060216481 is an equidigital number, since it uses as much as digits as its factorization.

18060216481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777550.

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 18060216481 in words is "eighteen billion, sixty million, two hundred sixteen thousand, four hundred eighty-one".