21152334325650 has 192 divisors, whose sum is σ = 57324659558400. Its totient is φ = 5119067232000.

The previous prime is 21152334325621. The next prime is 21152334325651. The reversal of 21152334325650 is 5652343325112.

It is not an unprimeable number, because it can be changed into a prime (21152334325651) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2775528840 + ... + 2775536460.

It is an arithmetic number, because the mean of its divisors is an integer number (298565935200).

Almost surely, 2^{21152334325650} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21152334325650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28662329779200).

21152334325650 is an abundant number, since it is smaller than the sum of its proper divisors (36172325232750).

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

21152334325650 is a wasteful number, since it uses less digits than its factorization.

21152334325650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10305 (or 10300 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 21152334325650 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred thirty-four million, three hundred twenty-five thousand, six hundred fifty".