21216600363530 has 64 divisors (see below), whose sum is σ = 44891517686400. Its totient is φ = 7117674405120.

The previous prime is 21216600363443. The next prime is 21216600363601. The reversal of 21216600363530 is 3536300661212.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1588400 + ... + 6704939.

It is an arithmetic number, because the mean of its divisors is an integer number (701429963850).

Almost surely, 2^{21216600363530} is an apocalyptic number.

21216600363530 is an abundant number, since it is smaller than the sum of its proper divisors (23674917322870).

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

21216600363530 is a wasteful number, since it uses less digits than its factorization.

21216600363530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8295159.

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 21216600363530 in words is "twenty-one trillion, two hundred sixteen billion, six hundred million, three hundred sixty-three thousand, five hundred thirty".