20680101 has 12 divisors (see below), whose sum is σ = 32169228. Its totient is φ = 12726144.

The previous prime is 20680091. The next prime is 20680133. The reversal of 20680101 is 10108602.

It can be written as a sum of positive squares in 2 ways, for example, as 1887876 + 18792225 = 1374^2 + 4335^2 .

It is not a de Polignac number, because 20680101 - 2¹⁹ = 20155813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20680181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88260 + ... + 88493.

It is an arithmetic number, because the mean of its divisors is an integer number (2680769).

Almost surely, 2^20680101 is an apocalyptic number.

It is an amenable number.

20680101 is a deficient number, since it is larger than the sum of its proper divisors (11489127).

20680101 is a wasteful number, since it uses less digits than its factorization.

20680101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176772 (or 176769 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 20680101 is about 4547.5379052846. The cubic root of 20680101 is about 274.4843272925.

Adding to 20680101 its reverse (10108602), we get a palindrome (30788703).

The spelling of 20680101 in words is "twenty million, six hundred eighty thousand, one hundred one".