18073538 has 48 divisors (see below), whose sum is σ = 34038144. Its totient is φ = 7032960.

The previous prime is 18073519. The next prime is 18073543. The reversal of 18073538 is 83537081.

It is a junction number, because it is equal to n+sod(n) for n = 18073498 and 18073507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440798 + ... + 440838.

It is an arithmetic number, because the mean of its divisors is an integer number (709128).

Almost surely, 2^18073538 is an apocalyptic number.

18073538 is a deficient number, since it is larger than the sum of its proper divisors (15964606).

18073538 is a wasteful number, since it uses less digits than its factorization.

18073538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 18073538 is about 4251.2983899040. The cubic root of 18073538 is about 262.4305509398.

The spelling of 18073538 in words is "eighteen million, seventy-three thousand, five hundred thirty-eight".