18998941 has 8 divisors (see below), whose sum is σ = 20512800. Its totient is φ = 17492592.

The previous prime is 18998933. The next prime is 18998957. The reversal of 18998941 is 14989981.

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

It is not a de Polignac number, because 18998941 - 2³ = 18998933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18998921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4110 + ... + 7408.

It is an arithmetic number, because the mean of its divisors is an integer number (2564100).

Almost surely, 2^18998941 is an apocalyptic number.

It is an amenable number.

18998941 is a deficient number, since it is larger than the sum of its proper divisors (1513859).

18998941 is a wasteful number, since it uses less digits than its factorization.

18998941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755.

The product of its digits is 186624, while the sum is 49.

The square root of 18998941 is about 4358.7774662169. Note that the first 3 decimals coincide. The cubic root of 18998941 is about 266.8352071707.

The spelling of 18998941 in words is "eighteen million, nine hundred ninety-eight thousand, nine hundred forty-one".