18938033 has 4 divisors (see below), whose sum is σ = 18950208. Its totient is φ = 18925860.

The previous prime is 18938011. The next prime is 18938047. The reversal of 18938033 is 33083981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18938033 - 2¹⁴ = 18921649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18937984 and 18938002.

It is not an unprimeable number, because it can be changed into a prime (18938063) 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, 3341 + ... + 7002.

It is an arithmetic number, because the mean of its divisors is an integer number (4737552).

Almost surely, 2^18938033 is an apocalyptic number.

It is an amenable number.

18938033 is a deficient number, since it is larger than the sum of its proper divisors (12175).

18938033 is a wasteful number, since it uses less digits than its factorization.

18938033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12174.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 18938033 is about 4351.7850360513. The cubic root of 18938033 is about 266.5497562176.

The spelling of 18938033 in words is "eighteen million, nine hundred thirty-eight thousand, thirty-three".