18355945445 has 8 divisors (see below), whose sum is σ = 22355898144. Its totient is φ = 14465580624.

The previous prime is 18355945423. The next prime is 18355945459. The reversal of 18355945445 is 54454955381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18355945445 - 2²⁶ = 18288836581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27396599 + ... + 27397268.

It is an arithmetic number, because the mean of its divisors is an integer number (2794487268).

Almost surely, 2^18355945445 is an apocalyptic number.

It is an amenable number.

18355945445 is a deficient number, since it is larger than the sum of its proper divisors (3999952699).

18355945445 is an equidigital number, since it uses as much as digits as its factorization.

18355945445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54793939.

The product of its digits is 8640000, while the sum is 53.

The spelling of 18355945445 in words is "eighteen billion, three hundred fifty-five million, nine hundred forty-five thousand, four hundred forty-five".