20202100 has 18 divisors (see below), whose sum is σ = 43838774. Its totient is φ = 8080800.

The previous prime is 20202097. The next prime is 20202107. The reversal of 20202100 is 120202.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1175056 + 19027044 = 1084^2 + 4362^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100911 + ... + 101110.

Almost surely, 2^20202100 is an apocalyptic number.

20202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202100 is an abundant number, since it is smaller than the sum of its proper divisors (23636674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20202100 is a wasteful number, since it uses less digits than its factorization.

20202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202035 (or 202028 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20202100 is about 4494.6746267110. The cubic root of 20202100 is about 272.3530054783.

Adding to 20202100 its reverse (120202), we get a palindrome (20322302).

It can be divided in two parts, 20202 and 100, that added together give a palindrome (20302).

The spelling of 20202100 in words is "twenty million, two hundred two thousand, one hundred".