20901109912 has 32 divisors (see below), whose sum is σ = 41848732800. Its totient is φ = 9764697600.

The previous prime is 20901109909. The next prime is 20901109913. The reversal of 20901109912 is 21990110902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20901109913) by changing a digit.

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, 1445889 + ... + 1460272.

It is an arithmetic number, because the mean of its divisors is an integer number (1307772900).

Almost surely, 2^20901109912 is an apocalyptic number.

It is an amenable number.

20901109912 is an abundant number, since it is smaller than the sum of its proper divisors (20947622888).

20901109912 is a wasteful number, since it uses less digits than its factorization.

20901109912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906227 (or 2906223 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 20901109912 in words is "twenty billion, nine hundred one million, one hundred nine thousand, nine hundred twelve".