20184998 has 4 divisors (see below), whose sum is σ = 30277500. Its totient is φ = 10092498.

The previous prime is 20184977. The next prime is 20185003. The reversal of 20184998 is 89948102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5046248 + ... + 5046251.

It is an arithmetic number, because the mean of its divisors is an integer number (7569375).

Almost surely, 2^20184998 is an apocalyptic number.

20184998 is a deficient number, since it is larger than the sum of its proper divisors (10092502).

20184998 is a wasteful number, since it uses less digits than its factorization.

20184998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10092501.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 20184998 is about 4492.7717502673. The cubic root of 20184998 is about 272.2761306969.

The spelling of 20184998 in words is "twenty million, one hundred eighty-four thousand, nine hundred ninety-eight".