18241743844 has 9 divisors (see below), whose sum is σ = 31923524451. Its totient is φ = 9120736860.

The previous prime is 18241743829. The next prime is 18241743851. The reversal of 18241743844 is 44834714281.

The square root of 18241743844 is 135062.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×18241743844² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18241743794 and 18241743803.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 236359 + ... + 303889.

Almost surely, 2^18241743844 is an apocalyptic number.

18241743844 is the 135062-nd square number.

It is an amenable number.

18241743844 is a deficient number, since it is larger than the sum of its proper divisors (13681780607).

18241743844 is an frugal number, since it uses more digits than its factorization.

18241743844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135066 (or 67533 counting only the distinct ones).

The product of its digits is 688128, while the sum is 46.

The spelling of 18241743844 in words is "eighteen billion, two hundred forty-one million, seven hundred forty-three thousand, eight hundred forty-four".