21533410312050 has 192 divisors, whose sum is σ = 66199452963840. Its totient is φ = 4510626842880.

The previous prime is 21533410312039. The next prime is 21533410312213. The reversal of 21533410312050 is 5021301433512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 21533410311999 and 21533410312017.

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, 3777252 + ... + 7571951.

It is an arithmetic number, because the mean of its divisors is an integer number (344788817520).

Almost surely, 2^{21533410312050} is an apocalyptic number.

21533410312050 is an abundant number, since it is smaller than the sum of its proper divisors (44666042651790).

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

21533410312050 is a wasteful number, since it uses less digits than its factorization.

21533410312050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11349377 (or 11349372 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 21533410312050 its reverse (5021301433512), we get a palindrome (26554711745562).

The spelling of 21533410312050 in words is "twenty-one trillion, five hundred thirty-three billion, four hundred ten million, three hundred twelve thousand, fifty".