18236023404 has 12 divisors (see below), whose sum is σ = 42550721304. Its totient is φ = 6078674464.

The previous prime is 18236023349. The next prime is 18236023439. The reversal of 18236023404 is 40432063281.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 759834297 + ... + 759834320.

It is an arithmetic number, because the mean of its divisors is an integer number (3545893442).

Almost surely, 2^18236023404 is an apocalyptic number.

It is an amenable number.

18236023404 is an abundant number, since it is smaller than the sum of its proper divisors (24314697900).

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

18236023404 is a wasteful number, since it uses less digits than its factorization.

18236023404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519668624 (or 1519668622 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 18236023404 its reverse (40432063281), we get a palindrome (58668086685).

The spelling of 18236023404 in words is "eighteen billion, two hundred thirty-six million, twenty-three thousand, four hundred four".