20100685 has 8 divisors (see below), whose sum is σ = 26313696. Its totient is φ = 14618640.

The previous prime is 20100673. The next prime is 20100709. The reversal of 20100685 is 58600102.

It is a happy number.

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

It is not a de Polignac number, because 20100685 - 2⁷ = 20100557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 182679 + ... + 182788.

It is an arithmetic number, because the mean of its divisors is an integer number (3289212).

Almost surely, 2^20100685 is an apocalyptic number.

It is an amenable number.

20100685 is a deficient number, since it is larger than the sum of its proper divisors (6213011).

20100685 is a wasteful number, since it uses less digits than its factorization.

20100685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365483.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 20100685 is about 4483.3787482210. The cubic root of 20100685 is about 271.8965013162.

Adding to 20100685 its reverse (58600102), we get a palindrome (78700787).

The spelling of 20100685 in words is "twenty million, one hundred thousand, six hundred eighty-five".