21375567352 has 16 divisors (see below), whose sum is σ = 40082564160. Its totient is φ = 10686883584.

The previous prime is 21375567349. The next prime is 21375567377. The reversal of 21375567352 is 25376557312.

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 3 ways as a sum of consecutive naturals, for example, 5608 + ... + 206839.

It is an arithmetic number, because the mean of its divisors is an integer number (2505160260).

Almost surely, 2^21375567352 is an apocalyptic number.

It is an amenable number.

21375567352 is a deficient number, since it is larger than the sum of its proper divisors (18706996808).

21375567352 is a wasteful number, since it uses less digits than its factorization.

21375567352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225030 (or 225026 counting only the distinct ones).

The product of its digits is 1323000, while the sum is 46.

The spelling of 21375567352 in words is "twenty-one billion, three hundred seventy-five million, five hundred sixty-seven thousand, three hundred fifty-two".