18553450444 has 24 divisors (see below), whose sum is σ = 32745259008. Its totient is φ = 9197980560.

The previous prime is 18553450441. The next prime is 18553450471. The reversal of 18553450444 is 44405435581.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18553450444.

It is not an unprimeable number, because it can be changed into a prime (18553450441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194997 + ... + 274099.

It is an arithmetic number, because the mean of its divisors is an integer number (1364385792).

Almost surely, 2^18553450444 is an apocalyptic number.

It is an amenable number.

18553450444 is a deficient number, since it is larger than the sum of its proper divisors (14191808564).

18553450444 is a wasteful number, since it uses less digits than its factorization.

18553450444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79605 (or 79603 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 43.

The spelling of 18553450444 in words is "eighteen billion, five hundred fifty-three million, four hundred fifty thousand, four hundred forty-four".