18441005851 has 4 divisors (see below), whose sum is σ = 18458354992. Its totient is φ = 18423656712.

The previous prime is 18441005827. The next prime is 18441005881. The reversal of 18441005851 is 15850014481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18441005851 - 2²⁹ = 17904134939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18441005851.

It is not an unprimeable number, because it can be changed into a prime (18441005881) 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, 8672976 + ... + 8675101.

It is an arithmetic number, because the mean of its divisors is an integer number (4614588748).

Almost surely, 2^18441005851 is an apocalyptic number.

18441005851 is a deficient number, since it is larger than the sum of its proper divisors (17349141).

18441005851 is a wasteful number, since it uses less digits than its factorization.

18441005851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17349140.

The product of its (nonzero) digits is 25600, while the sum is 37.

The spelling of 18441005851 in words is "eighteen billion, four hundred forty-one million, five thousand, eight hundred fifty-one".