18435344838 has 8 divisors (see below), whose sum is σ = 36870689688. Its totient is φ = 6145114944.

The previous prime is 18435344773. The next prime is 18435344849. The reversal of 18435344838 is 83844353481.

It is a happy number.

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

18435344838 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536278731 + ... + 1536278742.

It is an arithmetic number, because the mean of its divisors is an integer number (4608836211).

Almost surely, 2^18435344838 is an apocalyptic number.

18435344838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18435344838 is a wasteful number, since it uses less digits than its factorization.

18435344838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072557478.

The product of its digits is 4423680, while the sum is 51.

The spelling of 18435344838 in words is "eighteen billion, four hundred thirty-five million, three hundred forty-four thousand, eight hundred thirty-eight".