20184986 has 8 divisors (see below), whose sum is σ = 31321620. Its totient is φ = 9744448.

The previous prime is 20184977. The next prime is 20185003. The reversal of 20184986 is 68948102.

It can be written as a sum of positive squares in 2 ways, for example, as 20079361 + 105625 = 4481^2 + 325^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 173951 + ... + 174066.

Almost surely, 2^20184986 is an apocalyptic number.

20184986 is a deficient number, since it is larger than the sum of its proper divisors (11136634).

20184986 is a wasteful number, since it uses less digits than its factorization.

20184986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348048.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 20184986 is about 4492.7704147886. The cubic root of 20184986 is about 272.2760767408.

The spelling of 20184986 in words is "twenty million, one hundred eighty-four thousand, nine hundred eighty-six".