21652705831412 has 24 divisors (see below), whose sum is σ = 38030450570112. Its totient is φ = 10786912646400.

The previous prime is 21652705831409. The next prime is 21652705831453. The reversal of 21652705831412 is 21413850725612.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4490414 + ... + 7966757.

It is an arithmetic number, because the mean of its divisors is an integer number (1584602107088).

Almost surely, 2^{21652705831412} is an apocalyptic number.

It is an amenable number.

21652705831412 is a deficient number, since it is larger than the sum of its proper divisors (16377744738700).

21652705831412 is a wasteful number, since it uses less digits than its factorization.

21652705831412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12458759 (or 12458757 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 21652705831412 in words is "twenty-one trillion, six hundred fifty-two billion, seven hundred five million, eight hundred thirty-one thousand, four hundred twelve".