21641329710 has 1152 divisors, whose sum is σ = 84325183488. Its totient is φ = 3919104000.

The previous prime is 21641329673. The next prime is 21641329733. The reversal of 21641329710 is 1792314612.

21641329710 is a `hidden beast` number, since 2 + 1 + 641 + 3 + 2 + 9 + 7 + 1 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 527837290 + ... + 527837330.

It is an arithmetic number, because the mean of its divisors is an integer number (73198944).

Almost surely, 2^21641329710 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21641329710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42162591744).

21641329710 is an abundant number, since it is smaller than the sum of its proper divisors (62683853778).

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

21641329710 is a wasteful number, since it uses less digits than its factorization.

21641329710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 21641329710 in words is "twenty-one billion, six hundred forty-one million, three hundred twenty-nine thousand, seven hundred ten".