21533533552230 has 192 divisors, whose sum is σ = 62784105592320. Its totient is φ = 4629352186368.

The previous prime is 21533533552229. The next prime is 21533533552243. The reversal of 21533533552230 is 3225533533512.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9515842 + ... + 11559338.

It is an arithmetic number, because the mean of its divisors is an integer number (327000549960).

Almost surely, 2^{21533533552230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21533533552230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31392052796160).

21533533552230 is an abundant number, since it is smaller than the sum of its proper divisors (41250572040090).

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

21533533552230 is a wasteful number, since it uses less digits than its factorization.

21533533552230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043691 (or 2043672 counting only the distinct ones).

The product of its (nonzero) digits is 1215000, while the sum is 42.

The spelling of 21533533552230 in words is "twenty-one trillion, five hundred thirty-three billion, five hundred thirty-three million, five hundred fifty-two thousand, two hundred thirty".