20100000000100 has 36 divisors (see below), whose sum is σ = 44142506042544. Its totient is φ = 7943132526880.

The previous prime is 20100000000053. The next prime is 20100000000161. The reversal of 20100000000100 is 100000000102.

It is a Harshad number since it is a multiple of its sum of digits (4).

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, 1210835074 + ... + 1210851673.

It is an arithmetic number, because the mean of its divisors is an integer number (1226180723404).

Almost surely, 2^{20100000000100} is an apocalyptic number.

20100000000100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100000000100 is an abundant number, since it is smaller than the sum of its proper divisors (24042506042444).

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

20100000000100 is a wasteful number, since it uses less digits than its factorization.

20100000000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421686844 (or 2421686837 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

Adding to 20100000000100 its reverse (100000000102), we get a palindrome (20200000000202).

The spelling of 20100000000100 in words is "twenty trillion, one hundred billion, one hundred", and thus it is an aban number.