21143041752 has 48 divisors (see below), whose sum is σ = 61487420760. Its totient is φ = 6040868736.

The previous prime is 21143041739. The next prime is 21143041781. The reversal of 21143041752 is 25714034112.

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, 8988213 + ... + 8990564.

Almost surely, 2^21143041752 is an apocalyptic number.

It is an amenable number.

21143041752 is an abundant number, since it is smaller than the sum of its proper divisors (40344379008).

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

21143041752 is a wasteful number, since it uses less digits than its factorization.

21143041752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17978800 (or 17978789 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

Adding to 21143041752 its reverse (25714034112), we get a palindrome (46857075864).

The spelling of 21143041752 in words is "twenty-one billion, one hundred forty-three million, forty-one thousand, seven hundred fifty-two".