20001022100 has 36 divisors (see below), whose sum is σ = 43689682848. Its totient is φ = 7947420000.

The previous prime is 20001022081. The next prime is 20001022103. The reversal of 20001022100 is 122010002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001022103) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 647186 + ... + 677385.

Almost surely, 2^20001022100 is an apocalyptic number.

20001022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001022100 is an abundant number, since it is smaller than the sum of its proper divisors (23688660748).

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

20001022100 is a wasteful number, since it uses less digits than its factorization.

20001022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324736 (or 1324729 counting only the distinct ones).

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

Adding to 20001022100 its reverse (122010002), we get a palindrome (20123032102).

The spelling of 20001022100 in words is "twenty billion, one million, twenty-two thousand, one hundred".