21152354310 has 128 divisors (see below), whose sum is σ = 58406400000. Its totient is φ = 5441748480.

The previous prime is 21152354309. The next prime is 21152354347. The reversal of 21152354310 is 1345325112.

21152354310 is a `hidden beast` number, since 2 + 115 + 2 + 3 + 543 + 1 + 0 = 666.

It is a super-2 number, since 2×21152354310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2816941 + ... + 2824439.

It is an arithmetic number, because the mean of its divisors is an integer number (456300000).

Almost surely, 2^21152354310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21152354310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29203200000).

21152354310 is an abundant number, since it is smaller than the sum of its proper divisors (37254045690).

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

21152354310 is a wasteful number, since it uses less digits than its factorization.

21152354310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7883 (or 7877 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 21152354310 its reverse (1345325112), we get a palindrome (22497679422).

The spelling of 21152354310 in words is "twenty-one billion, one hundred fifty-two million, three hundred fifty-four thousand, three hundred ten".