21752434411 has 12 divisors (see below), whose sum is σ = 23346689400. Its totient is φ = 20258268768.

The previous prime is 21752434399. The next prime is 21752434441. The reversal of 21752434411 is 11443425712.

It is not a de Polignac number, because 21752434411 - 2⁷ = 21752434283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21752434441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489346 + ... + 531943.

It is an arithmetic number, because the mean of its divisors is an integer number (1945557450).

Almost surely, 2^21752434411 is an apocalyptic number.

21752434411 is a deficient number, since it is larger than the sum of its proper divisors (1594254989).

21752434411 is a wasteful number, since it uses less digits than its factorization.

21752434411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021386 (or 1021367 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The spelling of 21752434411 in words is "twenty-one billion, seven hundred fifty-two million, four hundred thirty-four thousand, four hundred eleven".