21327810752 has 28 divisors (see below), whose sum is σ = 42858110880. Its totient is φ = 10528916736.

The previous prime is 21327810731. The next prime is 21327810767. The reversal of 21327810752 is 25701872312.

It is a super-2 number, since 2×21327810752² (a number of 21 digits) contains 22 as substring.

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, 2104103 + ... + 2114214.

Almost surely, 2^21327810752 is an apocalyptic number.

It is an amenable number.

21327810752 is an abundant number, since it is smaller than the sum of its proper divisors (21530300128).

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

21327810752 is an equidigital number, since it uses as much as digits as its factorization.

21327810752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218408 (or 4218398 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The spelling of 21327810752 in words is "twenty-one billion, three hundred twenty-seven million, eight hundred ten thousand, seven hundred fifty-two".