21052250013 has 8 divisors (see below), whose sum is σ = 28070352576. Its totient is φ = 14034490400.

The previous prime is 21052249997. The next prime is 21052250057. The reversal of 21052250013 is 31005225012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21052250013 - 2⁴ = 21052249997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21052250213) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 150448 + ... + 254438.

It is an arithmetic number, because the mean of its divisors is an integer number (3508794072).

Almost surely, 2^21052250013 is an apocalyptic number.

It is an amenable number.

21052250013 is a deficient number, since it is larger than the sum of its proper divisors (7018102563).

21052250013 is a wasteful number, since it uses less digits than its factorization.

21052250013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171475.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 21052250013 its reverse (31005225012), we get a palindrome (52057475025).

The spelling of 21052250013 in words is "twenty-one billion, fifty-two million, two hundred fifty thousand, thirteen".