100000000020 has 24 divisors (see below), whose sum is σ = 280000000224. Its totient is φ = 26666666656.

The previous prime is 100000000019. The next prime is 100000000057. The reversal of 100000000020 is 20000000001.

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 99999999933 and 100000000014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833333274 + ... + 833333393.

It is an arithmetic number, because the mean of its divisors is an integer number (11666666676).

Almost surely, 2^100000000020 is an apocalyptic number.

100000000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100000000020 is an abundant number, since it is smaller than the sum of its proper divisors (180000000204).

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

100000000020 is a wasteful number, since it uses less digits than its factorization.

100000000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666666679 (or 1666666677 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 3.

Adding to 100000000020 its reverse (20000000001), we get a palindrome (120000000021).

The spelling of 100000000020 in words is "one hundred billion, twenty", and thus it is an aban number.