20202100100 has 144 divisors (see below), whose sum is σ = 54974481408. Its totient is φ = 6272847360.

The previous prime is 20202100097. The next prime is 20202100103. The reversal of 20202100100 is 100120202.

It is an interprime number because it is at equal distance from previous prime (20202100097) and next prime (20202100103).

It is not an unprimeable number, because it can be changed into a prime (20202100103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 461357 + ... + 503243.

It is an arithmetic number, because the mean of its divisors is an integer number (381767232).

Almost surely, 2^20202100100 is an apocalyptic number.

20202100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20202100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27487240704).

20202100100 is an abundant number, since it is smaller than the sum of its proper divisors (34772381308).

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

20202100100 is a wasteful number, since it uses less digits than its factorization.

20202100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41974 (or 41967 counting only the distinct ones).

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

Adding to 20202100100 its reverse (100120202), we get a palindrome (20302220302).

The spelling of 20202100100 in words is "twenty billion, two hundred two million, one hundred thousand, one hundred".