18455255481 has 32 divisors (see below), whose sum is σ = 26649165312. Its totient is φ = 11293286400.

The previous prime is 18455255479. The next prime is 18455255537.

18455255481 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18455255481 - 2¹ = 18455255479 is a prime.

It is a super-2 number, since 2×18455255481² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18455255481.

It is not an unprimeable number, because it can be changed into a prime (18455255381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5518896 + ... + 5522238.

It is an arithmetic number, because the mean of its divisors is an integer number (832786416).

Almost surely, 2^18455255481 is an apocalyptic number.

It is an amenable number.

18455255481 is a deficient number, since it is larger than the sum of its proper divisors (8193909831).

18455255481 is a wasteful number, since it uses less digits than its factorization.

18455255481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113.

The product of its digits is 1280000, while the sum is 48.

The spelling of 18455255481 in words is "eighteen billion, four hundred fifty-five million, two hundred fifty-five thousand, four hundred eighty-one".