20312211100 has 36 divisors (see below), whose sum is σ = 44179859808. Its totient is φ = 8106016000.

The previous prime is 20312211097. The next prime is 20312211119. The reversal of 20312211100 is 111221302.

It is a congruent number.

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, 192541 + ... + 278740.

It is an arithmetic number, because the mean of its divisors is an integer number (1227218328).

Almost surely, 2^20312211100 is an apocalyptic number.

20312211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312211100 is an abundant number, since it is smaller than the sum of its proper divisors (23867648708).

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

20312211100 is a wasteful number, since it uses less digits than its factorization.

20312211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471726 (or 471719 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20312211100 its reverse (111221302), we get a palindrome (20423432402).

The spelling of 20312211100 in words is "twenty billion, three hundred twelve million, two hundred eleven thousand, one hundred".