21203650604115 has 64 divisors (see below), whose sum is σ = 44470124421120. Its totient is φ = 9380416844160.

The previous prime is 21203650604089. The next prime is 21203650604221. The reversal of 21203650604115 is 51140605630212.

21203650604115 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 36 + 5 + 0 + 604 + 1 + 15 = 666.

It is not a de Polignac number, because 21203650604115 - 2¹⁶ = 21203650538579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21203650604115.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 361869504 + ... + 361928093.

It is an arithmetic number, because the mean of its divisors is an integer number (694845694080).

Almost surely, 2^{21203650604115} is an apocalyptic number.

21203650604115 is an abundant number, since it is smaller than the sum of its proper divisors (23266473817005).

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

21203650604115 is a wasteful number, since it uses less digits than its factorization.

21203650604115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723797649 (or 723797643 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 21203650604115 in words is "twenty-one trillion, two hundred three billion, six hundred fifty million, six hundred four thousand, one hundred fifteen".