21550542032330 has 16 divisors (see below), whose sum is σ = 39522880860264. Its totient is φ = 8457571212480.

The previous prime is 21550542032329. The next prime is 21550542032389. The reversal of 21550542032330 is 3323024505512.

It can be written as a sum of positive squares in 4 ways, for example, as 18613969700881 + 2936572331449 = 4314391^2 + 1713643^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20330699501 + ... + 20330700560.

Almost surely, 2^{21550542032330} is an apocalyptic number.

21550542032330 is a deficient number, since it is larger than the sum of its proper divisors (17972338827934).

21550542032330 is a wasteful number, since it uses less digits than its factorization.

21550542032330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40661400121.

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 21550542032330 its reverse (3323024505512), we get a palindrome (24873566537842).

The spelling of 21550542032330 in words is "twenty-one trillion, five hundred fifty billion, five hundred forty-two million, thirty-two thousand, three hundred thirty".