21543052876 has 12 divisors (see below), whose sum is σ = 37719235008. Its totient is φ = 10766128592.

The previous prime is 21543052871. The next prime is 21543052877. The reversal of 21543052876 is 67825034512.

It is not an unprimeable number, because it can be changed into a prime (21543052871) 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, 1340476 + ... + 1356451.

It is an arithmetic number, because the mean of its divisors is an integer number (3143269584).

Almost surely, 2^21543052876 is an apocalyptic number.

It is an amenable number.

21543052876 is a deficient number, since it is larger than the sum of its proper divisors (16176182132).

21543052876 is a wasteful number, since it uses less digits than its factorization.

21543052876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698928 (or 2698926 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 21543052876 in words is "twenty-one billion, five hundred forty-three million, fifty-two thousand, eight hundred seventy-six".