20117486 has 8 divisors (see below), whose sum is σ = 30589824. Its totient is φ = 9920880.

The previous prime is 20117473. The next prime is 20117497. The reversal of 20117486 is 68471102.

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 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, 68750 + ... + 69041.

It is an arithmetic number, because the mean of its divisors is an integer number (3823728).

Almost surely, 2^20117486 is an apocalyptic number.

20117486 is a deficient number, since it is larger than the sum of its proper divisors (10472338).

20117486 is a wasteful number, since it uses less digits than its factorization.

20117486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137866.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 20117486 is about 4485.2520553476. The cubic root of 20117486 is about 271.9722344063.

Adding to 20117486 its reverse (68471102), we get a palindrome (88588588).

The spelling of 20117486 in words is "twenty million, one hundred seventeen thousand, four hundred eighty-six".