21152335262013 has 16 divisors (see below), whose sum is σ = 31928053227840. Its totient is φ = 13835489730192.

The previous prime is 21152335261979. The next prime is 21152335262041. The reversal of 21152335262013 is 31026253325112.

21152335262013 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 23 + 3 + 5 + 2 + 620 + 1 + 3 = 666.

It is not a de Polignac number, because 21152335262013 - 2³⁶ = 21083615785277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152335262053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7390751631 + ... + 7390754492.

It is an arithmetic number, because the mean of its divisors is an integer number (1995503326740).

Almost surely, 2^{21152335262013} is an apocalyptic number.

It is an amenable number.

21152335262013 is a deficient number, since it is larger than the sum of its proper divisors (10775717965827).

21152335262013 is a wasteful number, since it uses less digits than its factorization.

21152335262013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14781506185 (or 14781506179 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 21152335262013 its reverse (31026253325112), we get a palindrome (52178588587125).

The spelling of 21152335262013 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred thirty-five million, two hundred sixty-two thousand, thirteen".