20031100 has 36 divisors (see below), whose sum is σ = 46028304. Its totient is φ = 7540480.

The previous prime is 20031059. The next prime is 20031101. The reversal of 20031100 is 113002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031101) 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, 4192 + ... + 7591.

It is an arithmetic number, because the mean of its divisors is an integer number (1278564).

Almost surely, 2^20031100 is an apocalyptic number.

20031100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031100 is an abundant number, since it is smaller than the sum of its proper divisors (25997204).

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

20031100 is a wasteful number, since it uses less digits than its factorization.

20031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11814 (or 11807 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 20031100 is about 4475.6116900375. The cubic root of 20031100 is about 271.5823861074.

Adding to 20031100 its reverse (113002), we get a palindrome (20144102).

The spelling of 20031100 in words is "twenty million, thirty-one thousand, one hundred".