18073938 has 8 divisors (see below), whose sum is σ = 36147888. Its totient is φ = 6024644.

The previous prime is 18073933. The next prime is 18073949. The reversal of 18073938 is 83937081.

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

18073938 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18073896 and 18073905.

It is not an unprimeable number, because it can be changed into a prime (18073933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1506156 + ... + 1506167.

It is an arithmetic number, because the mean of its divisors is an integer number (4518486).

Almost surely, 2^18073938 is an apocalyptic number.

18073938 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.

18073938 is a wasteful number, since it uses less digits than its factorization.

18073938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012328.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 18073938 is about 4251.3454340950. The cubic root of 18073938 is about 262.4324869460.

The spelling of 18073938 in words is "eighteen million, seventy-three thousand, nine hundred thirty-eight".