18826427644 has 24 divisors (see below), whose sum is σ = 33139991808. Its totient is φ = 9357922560.

The previous prime is 18826427629. The next prime is 18826427687. The reversal of 18826427644 is 44672462881.

It is a junction number, because it is equal to n+sod(n) for n = 18826427591 and 18826427600.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1332264 + ... + 1346320.

It is an arithmetic number, because the mean of its divisors is an integer number (1380832992).

Almost surely, 2^18826427644 is an apocalyptic number.

It is an amenable number.

18826427644 is a deficient number, since it is larger than the sum of its proper divisors (14313564164).

18826427644 is a wasteful number, since it uses less digits than its factorization.

18826427644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16005 (or 16003 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 52.

The spelling of 18826427644 in words is "eighteen billion, eight hundred twenty-six million, four hundred twenty-seven thousand, six hundred forty-four".