20290486 has 8 divisors (see below), whose sum is σ = 32226120. Its totient is φ = 9548448.

The previous prime is 20290471. The next prime is 20290489. The reversal of 20290486 is 68409202.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20290489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298356 + ... + 298423.

It is an arithmetic number, because the mean of its divisors is an integer number (4028265).

Almost surely, 2^20290486 is an apocalyptic number.

20290486 is a deficient number, since it is larger than the sum of its proper divisors (11935634).

20290486 is a wasteful number, since it uses less digits than its factorization.

20290486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596798.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20290486 is about 4504.4961982446. The cubic root of 20290486 is about 272.7496172467.

Adding to 20290486 its reverse (68409202), we get a palindrome (88699688).

The spelling of 20290486 in words is "twenty million, two hundred ninety thousand, four hundred eighty-six".