18728948244 has 12 divisors (see below), whose sum is σ = 43700879264. Its totient is φ = 6242982744.

The previous prime is 18728948243. The next prime is 18728948281. The reversal of 18728948244 is 44284982781.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18728948243) 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, 780372832 + ... + 780372855.

Almost surely, 2^18728948244 is an apocalyptic number.

It is an amenable number.

18728948244 is an abundant number, since it is smaller than the sum of its proper divisors (24971931020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18728948244 is a wasteful number, since it uses less digits than its factorization.

18728948244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560745694 (or 1560745692 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 57.

The spelling of 18728948244 in words is "eighteen billion, seven hundred twenty-eight million, nine hundred forty-eight thousand, two hundred forty-four".