20100302100 has 108 divisors (see below), whose sum is σ = 63125223616. Its totient is φ = 5349706560.

The previous prime is 20100302077. The next prime is 20100302113. The reversal of 20100302100 is 120300102.

It is a happy number.

It is a super-2 number, since 2×20100302100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 449349 + ... + 492051.

Almost surely, 2^20100302100 is an apocalyptic number.

20100302100 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 20100302100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31562611808).

20100302100 is an abundant number, since it is smaller than the sum of its proper divisors (43024921516).

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

20100302100 is a wasteful number, since it uses less digits than its factorization.

20100302100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43246 (or 43236 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 20100302100 its reverse (120300102), we get a palindrome (20220602202).

The spelling of 20100302100 in words is "twenty billion, one hundred million, three hundred two thousand, one hundred".