21350530520000 has 560 divisors, whose sum is σ = 61928490539520. Its totient is φ = 7214438400000.

The previous prime is 21350530519999. The next prime is 21350530520021. The reversal of 21350530520000 is 2503505312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 590901935 + ... + 590938065.

Almost surely, 2^{21350530520000} is an apocalyptic number.

21350530520000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21350530520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30964245269760).

21350530520000 is an abundant number, since it is smaller than the sum of its proper divisors (40577960019520).

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

21350530520000 is a wasteful number, since it uses less digits than its factorization.

21350530520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36270 (or 36245 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The spelling of 21350530520000 in words is "twenty-one trillion, three hundred fifty billion, five hundred thirty million, five hundred twenty thousand".