20012020100 has 18 divisors (see below), whose sum is σ = 43426083834. Its totient is φ = 8004808000.

The previous prime is 20012020057. The next prime is 20012020103. The reversal of 20012020100 is 102021002.

It can be written as a sum of positive squares in 3 ways, for example, as 5067446596 + 14944573504 = 71186^2 + 122248^2 .

It is not an unprimeable number, because it can be changed into a prime (20012020103) 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, 100060001 + ... + 100060200.

It is an arithmetic number, because the mean of its divisors is an integer number (2412560213).

Almost surely, 2^20012020100 is an apocalyptic number.

20012020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012020100 is an abundant number, since it is smaller than the sum of its proper divisors (23414063734).

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

20012020100 is a wasteful number, since it uses less digits than its factorization.

20012020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200120215 (or 200120208 counting only the distinct ones).

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

Adding to 20012020100 its reverse (102021002), we get a palindrome (20114041102).

The spelling of 20012020100 in words is "twenty billion, twelve million, twenty thousand, one hundred".