18244978050 has 72 divisors (see below), whose sum is σ = 48995931024. Its totient is φ = 4491065280.

The previous prime is 18244978039. The next prime is 18244978069. The reversal of 18244978050 is 5087944281.

It is a happy number.

It is a Curzon 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 35 ways as a sum of consecutive naturals, for example, 334512 + ... + 385211.

It is an arithmetic number, because the mean of its divisors is an integer number (680499042).

Almost surely, 2^18244978050 is an apocalyptic number.

18244978050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18244978050 is an abundant number, since it is smaller than the sum of its proper divisors (30750952974).

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

18244978050 is a wasteful number, since it uses less digits than its factorization.

18244978050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719764 (or 719746 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 18244978050 in words is "eighteen billion, two hundred forty-four million, nine hundred seventy-eight thousand, fifty".