20750686 has 8 divisors (see below), whose sum is σ = 33955704. Its totient is φ = 9432120.

The previous prime is 20750683. The next prime is 20750701. The reversal of 20750686 is 68605702.

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 (20750683) 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, 471585 + ... + 471628.

It is an arithmetic number, because the mean of its divisors is an integer number (4244463).

Almost surely, 2^20750686 is an apocalyptic number.

20750686 is a deficient number, since it is larger than the sum of its proper divisors (13205018).

20750686 is a wasteful number, since it uses less digits than its factorization.

20750686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943226.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 20750686 is about 4555.2920872322. The cubic root of 20750686 is about 274.7962612149.

The spelling of 20750686 in words is "twenty million, seven hundred fifty thousand, six hundred eighty-six".