20200012100 has 36 divisors (see below), whose sum is σ = 43911186900. Its totient is φ = 8065781760.

The previous prime is 20200012093. The next prime is 20200012109. The reversal of 20200012100 is 121000202.

It can be written as a sum of positive squares in 6 ways, for example, as 5826879556 + 14373132544 = 76334^2 + 119888^2 .

It is not an unprimeable number, because it can be changed into a prime (20200012109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120605 + ... + 234404.

Almost surely, 2^20200012100 is an apocalyptic number.

20200012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20200012100 is an abundant number, since it is smaller than the sum of its proper divisors (23711174800).

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

20200012100 is a wasteful number, since it uses less digits than its factorization.

20200012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355592 (or 355585 counting only the distinct ones).

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

Adding to 20200012100 its reverse (121000202), we get a palindrome (20321012302).

The spelling of 20200012100 in words is "twenty billion, two hundred million, twelve thousand, one hundred".