20020101 has 16 divisors (see below), whose sum is σ = 28627200. Its totient is φ = 12400128.

The previous prime is 20020093. The next prime is 20020103. The reversal of 20020101 is 10102002.

It is a happy number.

It is not a de Polignac number, because 20020101 - 2³ = 20020093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020103) 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 15 ways as a sum of consecutive naturals, for example, 1545 + ... + 6513.

It is an arithmetic number, because the mean of its divisors is an integer number (1789200).

Almost surely, 2^20020101 is an apocalyptic number.

It is an amenable number.

20020101 is a deficient number, since it is larger than the sum of its proper divisors (8607099).

20020101 is a wasteful number, since it uses less digits than its factorization.

20020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 20020101 is about 4474.3827507266. The cubic root of 20020101 is about 271.5326687251.

Adding to 20020101 its reverse (10102002), we get a palindrome (30122103).

It can be divided in two parts, 200 and 20101, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 20020101 in words is "twenty million, twenty thousand, one hundred one".