21023305551050 has 24 divisors (see below), whose sum is σ = 42658198173792. Its totient is φ = 7644838382000.

The previous prime is 21023305551049. The next prime is 21023305551077. The reversal of 21023305551050 is 5015550332012.

It is a super-2 number, since 2×21023305551050² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21023305550998 and 21023305551016.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19112095406 + ... + 19112096505.

It is an arithmetic number, because the mean of its divisors is an integer number (1777424923908).

Almost surely, 2^{21023305551050} is an apocalyptic number.

21023305551050 is an abundant number, since it is smaller than the sum of its proper divisors (21634892622742).

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

21023305551050 is a wasteful number, since it uses less digits than its factorization.

21023305551050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38224191934 (or 38224191929 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

Adding to 21023305551050 its reverse (5015550332012), we get a palindrome (26038855883062).

The spelling of 21023305551050 in words is "twenty-one trillion, twenty-three billion, three hundred five million, five hundred fifty-one thousand, fifty".