18303373444 has 12 divisors (see below), whose sum is σ = 32057760924. Its totient is φ = 9144013184.

The previous prime is 18303373441. The next prime is 18303373447. The reversal of 18303373444 is 44437330381.

It is an interprime number because it is at equal distance from previous prime (18303373441) and next prime (18303373447).

It can be written as a sum of positive squares in 2 ways, for example, as 8956351044 + 9347022400 = 94638^2 + 96680^2 .

It is a super-2 number, since 2×18303373444² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18303373397 and 18303373406.

It is not an unprimeable number, because it can be changed into a prime (18303373441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1913017 + ... + 1922560.

It is an arithmetic number, because the mean of its divisors is an integer number (2671480077).

Almost surely, 2^18303373444 is an apocalyptic number.

It is an amenable number.

18303373444 is a deficient number, since it is larger than the sum of its proper divisors (13754387480).

18303373444 is a wasteful number, since it uses less digits than its factorization.

18303373444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836774 (or 3836772 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 40.

The spelling of 18303373444 in words is "eighteen billion, three hundred three million, three hundred seventy-three thousand, four hundred forty-four".