21374332310550 has 96 divisors (see below), whose sum is σ = 55891413792000. Its totient is φ = 5390816146560.

The previous prime is 21374332310549. The next prime is 21374332310579. The reversal of 21374332310550 is 5501323347312.

It is a junction number, because it is equal to n+sod(n) for n = 21374332310499 and 21374332310508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4553089 + ... + 7967388.

It is an arithmetic number, because the mean of its divisors is an integer number (582202227000).

Almost surely, 2^{21374332310550} is an apocalyptic number.

21374332310550 is an abundant number, since it is smaller than the sum of its proper divisors (34517081481450).

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

21374332310550 is a wasteful number, since it uses less digits than its factorization.

21374332310550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12521110 (or 12521105 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 39.

Adding to 21374332310550 its reverse (5501323347312), we get a palindrome (26875655657862).

The spelling of 21374332310550 in words is "twenty-one trillion, three hundred seventy-four billion, three hundred thirty-two million, three hundred ten thousand, five hundred fifty".