18682451641 has 16 divisors (see below), whose sum is σ = 21412702080. Its totient is φ = 15967607040.

The previous prime is 18682451629. The next prime is 18682451687. The reversal of 18682451641 is 14615428681.

It is not a de Polignac number, because 18682451641 - 2²¹ = 18680354489 is a prime.

Its product of digits (368640) is a multiple of the sum of its prime divisors (6144).

It is a junction number, because it is equal to n+sod(n) for n = 18682451591 and 18682451600.

It is not an unprimeable number, because it can be changed into a prime (18682451621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4061755 + ... + 4066351.

It is an arithmetic number, because the mean of its divisors is an integer number (1338293880).

Almost surely, 2^18682451641 is an apocalyptic number.

It is an amenable number.

18682451641 is a deficient number, since it is larger than the sum of its proper divisors (2730250439).

18682451641 is an equidigital number, since it uses as much as digits as its factorization.

18682451641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6144.

The product of its digits is 368640, while the sum is 46.

The spelling of 18682451641 in words is "eighteen billion, six hundred eighty-two million, four hundred fifty-one thousand, six hundred forty-one".