20084491 has 4 divisors (see below), whose sum is σ = 22953712. Its totient is φ = 17215272.

The previous prime is 20084489. The next prime is 20084513. The reversal of 20084491 is 19448002.

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

It is a cyclic number.

It is not a de Polignac number, because 20084491 - 2¹ = 20084489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20084401) 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 3 ways as a sum of consecutive naturals, for example, 1434600 + ... + 1434613.

It is an arithmetic number, because the mean of its divisors is an integer number (5738428).

Almost surely, 2^20084491 is an apocalyptic number.

20084491 is a deficient number, since it is larger than the sum of its proper divisors (2869221).

20084491 is an equidigital number, since it uses as much as digits as its factorization.

20084491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869220.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20084491 is about 4481.5723803147. The cubic root of 20084491 is about 271.8234644203.

The spelling of 20084491 in words is "twenty million, eighty-four thousand, four hundred ninety-one".