20105101 has 8 divisors (see below), whose sum is σ = 21409920. Its totient is φ = 18813888.

The previous prime is 20105089. The next prime is 20105117. The reversal of 20105101 is 10150102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20105101 - 2⁹ = 20104589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105131) 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 7 ways as a sum of consecutive naturals, for example, 261 + ... + 6346.

It is an arithmetic number, because the mean of its divisors is an integer number (2676240).

Almost surely, 2^20105101 is an apocalyptic number.

It is an amenable number.

20105101 is a deficient number, since it is larger than the sum of its proper divisors (1304819).

20105101 is a wasteful number, since it uses less digits than its factorization.

20105101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6803.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 20105101 is about 4483.8712068925. The cubic root of 20105101 is about 271.9164112021.

Adding to 20105101 its reverse (10150102), we get a palindrome (30255203).

The spelling of 20105101 in words is "twenty million, one hundred five thousand, one hundred one".