18038723396 has 6 divisors (see below), whose sum is σ = 31567765950. Its totient is φ = 9019361696.

The previous prime is 18038723369. The next prime is 18038723401. The reversal of 18038723396 is 69332783081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12965010496 + 5073712900 = 113864^2 + 71230^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2254840421 + ... + 2254840428.

It is an arithmetic number, because the mean of its divisors is an integer number (5261294325).

Almost surely, 2^18038723396 is an apocalyptic number.

It is an amenable number.

18038723396 is a deficient number, since it is larger than the sum of its proper divisors (13529042554).

18038723396 is a wasteful number, since it uses less digits than its factorization.

18038723396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4509680853 (or 4509680851 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 18038723396 in words is "eighteen billion, thirty-eight million, seven hundred twenty-three thousand, three hundred ninety-six".