20220100 has 18 divisors (see below), whose sum is σ = 43877834. Its totient is φ = 8088000.

The previous prime is 20220077. The next prime is 20220103. The reversal of 20220100 is 102202.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6084 + 20214016 = 78^2 + 4496^2 .

It is not an unprimeable number, because it can be changed into a prime (20220103) 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, 101001 + ... + 101200.

Almost surely, 2^20220100 is an apocalyptic number.

20220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20220100 is an abundant number, since it is smaller than the sum of its proper divisors (23657734).

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

20220100 is a wasteful number, since it uses less digits than its factorization.

20220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202215 (or 202208 counting only the distinct ones).

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

The square root of 20220100 is about 4496.6765505204. The cubic root of 20220100 is about 272.4338699895.

Adding to 20220100 its reverse (102202), we get a palindrome (20322302).

It can be divided in two parts, 202 and 20100, that added together give a palindrome (20302).

The spelling of 20220100 in words is "twenty million, two hundred twenty thousand, one hundred".