21252335213 has 8 divisors (see below), whose sum is σ = 21334487616. Its totient is φ = 21170272000.

The previous prime is 21252335207. The next prime is 21252335227. The reversal of 21252335213 is 31253325212.

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 21252335213 - 2¹⁰ = 21252334189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252335413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476570 + ... + 519252.

It is an arithmetic number, because the mean of its divisors is an integer number (2666810952).

Almost surely, 2^21252335213 is an apocalyptic number.

It is an amenable number.

21252335213 is a deficient number, since it is larger than the sum of its proper divisors (82152403).

21252335213 is a wasteful number, since it uses less digits than its factorization.

21252335213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44595.

The product of its digits is 10800, while the sum is 29.

The spelling of 21252335213 in words is "twenty-one billion, two hundred fifty-two million, three hundred thirty-five thousand, two hundred thirteen".