20162101 has 4 divisors (see below), whose sum is σ = 20542572. Its totient is φ = 19781632.

The previous prime is 20162071. The next prime is 20162113. The reversal of 20162101 is 10126102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18062500 + 2099601 = 4250^2 + 1449^2 .

It is a cyclic number.

It is not a de Polignac number, because 20162101 - 2⁵ = 20162069 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 (20162171) 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, 190156 + ... + 190261.

It is an arithmetic number, because the mean of its divisors is an integer number (5135643).

Almost surely, 2^20162101 is an apocalyptic number.

It is an amenable number.

20162101 is a deficient number, since it is larger than the sum of its proper divisors (380471).

20162101 is an equidigital number, since it uses as much as digits as its factorization.

20162101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380470.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 20162101 is about 4490.2228229788. Note that the first 3 decimals coincide. The cubic root of 20162101 is about 272.1731389377.

Adding to 20162101 its reverse (10126102), we get a palindrome (30288203).

The spelling of 20162101 in words is "twenty million, one hundred sixty-two thousand, one hundred one".