18203794441 has 16 divisors (see below), whose sum is σ = 21527942400. Its totient is φ = 15383467680.

The previous prime is 18203794439. The next prime is 18203794457. The reversal of 18203794441 is 14449730281.

It is not a de Polignac number, because 18203794441 - 2¹ = 18203794439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18203794241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349396 + ... + 398101.

It is an arithmetic number, because the mean of its divisors is an integer number (1345496400).

Almost surely, 2^18203794441 is an apocalyptic number.

It is an amenable number.

18203794441 is a deficient number, since it is larger than the sum of its proper divisors (3324147959).

18203794441 is an frugal number, since it uses more digits than its factorization.

18203794441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747589 (or 747575 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 18203794441 in words is "eighteen billion, two hundred three million, seven hundred ninety-four thousand, four hundred forty-one".