21843975212 has 12 divisors (see below), whose sum is σ = 38874871560. Its totient is φ = 10736869056.

The previous prime is 21843975143. The next prime is 21843975217. The reversal of 21843975212 is 21257934812.

It is not an unprimeable number, because it can be changed into a prime (21843975217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46279373 + ... + 46279844.

It is an arithmetic number, because the mean of its divisors is an integer number (3239572630).

Almost surely, 2^21843975212 is an apocalyptic number.

It is an amenable number.

21843975212 is a deficient number, since it is larger than the sum of its proper divisors (17030896348).

21843975212 is a wasteful number, since it uses less digits than its factorization.

21843975212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92559280 (or 92559278 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The spelling of 21843975212 in words is "twenty-one billion, eight hundred forty-three million, nine hundred seventy-five thousand, two hundred twelve".