21216363360336 has 50 divisors (see below), whose sum is σ = 61406310933242. Its totient is φ = 7072121119680.

The previous prime is 21216363360323. The next prime is 21216363360343. The reversal of 21216363360336 is 63306336361212.

21216363360336 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 6 + 3 + 6 + 3 + 3 + 603 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19656312399936 + 1560050960400 = 4433544^2 + 1249020^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21216363360291 and 21216363360300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8185324075 + ... + 8185326666.

Almost surely, 2^{21216363360336} is an apocalyptic number.

It is an amenable number.

21216363360336 is an abundant number, since it is smaller than the sum of its proper divisors (40189947572906).

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

21216363360336 is a wasteful number, since it uses less digits than its factorization.

21216363360336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16370650761 (or 16370650746 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 45.

The spelling of 21216363360336 in words is "twenty-one trillion, two hundred sixteen billion, three hundred sixty-three million, three hundred sixty thousand, three hundred thirty-six".