18363938 has 8 divisors (see below), whose sum is σ = 27578880. Its totient is φ = 9170980.

The previous prime is 18363929. The next prime is 18363977. The reversal of 18363938 is 83936381.

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

It is a junction number, because it is equal to n+sod(n) for n = 18363895 and 18363904.

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, 3218 + ... + 6861.

It is an arithmetic number, because the mean of its divisors is an integer number (3447360).

Almost surely, 2^18363938 is an apocalyptic number.

18363938 is a deficient number, since it is larger than the sum of its proper divisors (9214942).

18363938 is a wasteful number, since it uses less digits than its factorization.

18363938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10992.

The product of its digits is 93312, while the sum is 41.

The square root of 18363938 is about 4285.3165577353. The cubic root of 18363938 is about 263.8286403267.

The spelling of 18363938 in words is "eighteen million, three hundred sixty-three thousand, nine hundred thirty-eight".