18433994 has 8 divisors (see below), whose sum is σ = 28853280. Its totient is φ = 8816236.

The previous prime is 18433993. The next prime is 18433999. The reversal of 18433994 is 49933481.

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

It is not an unprimeable number, because it can be changed into a prime (18433993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200324 + ... + 200415.

It is an arithmetic number, because the mean of its divisors is an integer number (3606660).

Almost surely, 2^18433994 is an apocalyptic number.

18433994 is a deficient number, since it is larger than the sum of its proper divisors (10419286).

18433994 is a wasteful number, since it uses less digits than its factorization.

18433994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400764.

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

The square root of 18433994 is about 4293.4827354957. The cubic root of 18433994 is about 264.1637050932.

The spelling of 18433994 in words is "eighteen million, four hundred thirty-three thousand, nine hundred ninety-four".