20100200020 has 48 divisors (see below), whose sum is σ = 44161044480. Its totient is φ = 7670364416.

The previous prime is 20100200011. The next prime is 20100200027. The reversal of 20100200020 is 2000200102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20100199976 and 20100200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100200027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119136 + ... + 233224.

It is an arithmetic number, because the mean of its divisors is an integer number (920021760).

Almost surely, 2^20100200020 is an apocalyptic number.

20100200020 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 20100200020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22080522240).

20100200020 is an abundant number, since it is smaller than the sum of its proper divisors (24060844460).

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

20100200020 is a wasteful number, since it uses less digits than its factorization.

20100200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114504 (or 114502 counting only the distinct ones).

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

Adding to 20100200020 its reverse (2000200102), we get a palindrome (22100400122).

The spelling of 20100200020 in words is "twenty billion, one hundred million, two hundred thousand, twenty".