20210002100 has 36 divisors (see below), whose sum is σ = 43863403500. Its totient is φ = 8082581760.

The previous prime is 20210002079. The next prime is 20210002117. The reversal of 20210002100 is 120001202.

It can be written as a sum of positive squares in 6 ways, for example, as 2651632036 + 17558370064 = 51494^2 + 132508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 698726 + ... + 727074.

It is an arithmetic number, because the mean of its divisors is an integer number (1218427875).

Almost surely, 2^20210002100 is an apocalyptic number.

20210002100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210002100 is an abundant number, since it is smaller than the sum of its proper divisors (23653401400).

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

20210002100 is a wasteful number, since it uses less digits than its factorization.

20210002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35492 (or 35485 counting only the distinct ones).

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

Adding to 20210002100 its reverse (120001202), we get a palindrome (20330003302).

The spelling of 20210002100 in words is "twenty billion, two hundred ten million, two thousand, one hundred".