18826847481 has 32 divisors (see below), whose sum is σ = 27876925440. Its totient is φ = 11229044544.

The previous prime is 18826847449. The next prime is 18826847513. The reversal of 18826847481 is 18474862881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18826847449) and next prime (18826847513).

It is not a de Polignac number, because 18826847481 - 2⁵ = 18826847449 is a prime.

It is a super-2 number, since 2×18826847481² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18826847581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138940 + ... + 238658.

It is an arithmetic number, because the mean of its divisors is an integer number (871153920).

Almost surely, 2^18826847481 is an apocalyptic number.

It is an amenable number.

18826847481 is a deficient number, since it is larger than the sum of its proper divisors (9050077959).

18826847481 is a wasteful number, since it uses less digits than its factorization.

18826847481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99885.

The product of its digits is 5505024, while the sum is 57.

The spelling of 18826847481 in words is "eighteen billion, eight hundred twenty-six million, eight hundred forty-seven thousand, four hundred eighty-one".