18943850 has 24 divisors (see below), whose sum is σ = 35414400. Its totient is φ = 7539120.

The previous prime is 18943849. The next prime is 18943853. The reversal of 18943850 is 5834981.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18943853) 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 11 ways as a sum of consecutive naturals, for example, 10301 + ... + 11999.

It is an arithmetic number, because the mean of its divisors is an integer number (1475600).

Almost surely, 2^18943850 is an apocalyptic number.

18943850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18943850 is a deficient number, since it is larger than the sum of its proper divisors (16470550).

18943850 is a wasteful number, since it uses less digits than its factorization.

18943850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934 (or 1929 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 18943850 is about 4352.4533311685. The cubic root of 18943850 is about 266.5770445357.

The spelling of 18943850 in words is "eighteen million, nine hundred forty-three thousand, eight hundred fifty".