18445795729 has 8 divisors (see below), whose sum is σ = 18477177152. Its totient is φ = 18414442800.

The previous prime is 18445795721. The next prime is 18445795807. The reversal of 18445795729 is 92759754481.

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 18445795729 - 2³ = 18445795721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18445795721) 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, 1570579 + ... + 1582279.

It is an arithmetic number, because the mean of its divisors is an integer number (2309647144).

Almost surely, 2^18445795729 is an apocalyptic number.

It is an amenable number.

18445795729 is a deficient number, since it is larger than the sum of its proper divisors (31381423).

18445795729 is a wasteful number, since it uses less digits than its factorization.

18445795729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14247.

The product of its digits is 25401600, while the sum is 61.

The spelling of 18445795729 in words is "eighteen billion, four hundred forty-five million, seven hundred ninety-five thousand, seven hundred twenty-nine".