20011010100 has 72 divisors (see below), whose sum is σ = 57914730720. Its totient is φ = 5334775680.

The previous prime is 20011010087. The next prime is 20011010161. The reversal of 20011010100 is 101011002.

It is a Harshad number since it is a multiple of its sum of digits (6).

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

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 23 ways as a sum of consecutive naturals, for example, 1436971 + ... + 1450829.

It is an arithmetic number, because the mean of its divisors is an integer number (804371260).

Almost surely, 2^20011010100 is an apocalyptic number.

20011010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011010100 is an abundant number, since it is smaller than the sum of its proper divisors (37903720620).

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

20011010100 is a wasteful number, since it uses less digits than its factorization.

20011010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18689 (or 18682 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 20011010100 its reverse (101011002), we get a palindrome (20112021102).

It can be divided in two parts, 2001 and 1010100, that added together give a palindrome (1012101).

The spelling of 20011010100 in words is "twenty billion, eleven million, ten thousand, one hundred".