20084390 has 8 divisors (see below), whose sum is σ = 36151920. Its totient is φ = 8033752.

The previous prime is 20084381. The next prime is 20084399. The reversal of 20084390 is 9348002.

It is an interprime number because it is at equal distance from previous prime (20084381) and next prime (20084399).

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20084399) 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, 1004210 + ... + 1004229.

It is an arithmetic number, because the mean of its divisors is an integer number (4518990).

Almost surely, 2^20084390 is an apocalyptic number.

20084390 is a deficient number, since it is larger than the sum of its proper divisors (16067530).

20084390 is a wasteful number, since it uses less digits than its factorization.

20084390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008446.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20084390 is about 4481.5611119341. The cubic root of 20084390 is about 271.8230087749.

The spelling of 20084390 in words is "twenty million, eighty-four thousand, three hundred ninety".