21052932443550 has 768 divisors, whose sum is σ = 72258346598400. Its totient is φ = 4402469491200.

The previous prime is 21052932443533. The next prime is 21052932443623. The reversal of 21052932443550 is 5534423925012.

It is a happy number.

21052932443550 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 2 + 93 + 2 + 4 + 4 + 3 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 21052932443496 and 21052932443505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 474452865 + ... + 474497235.

It is an arithmetic number, because the mean of its divisors is an integer number (94086388800).

Almost surely, 2^{21052932443550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21052932443550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36129173299200).

21052932443550 is an abundant number, since it is smaller than the sum of its proper divisors (51205414154850).

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

21052932443550 is a wasteful number, since it uses less digits than its factorization.

21052932443550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44518 (or 44507 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 21052932443550 in words is "twenty-one trillion, fifty-two billion, nine hundred thirty-two million, four hundred forty-three thousand, five hundred fifty".