21052242713 has 8 divisors (see below), whose sum is σ = 21400773120. Its totient is φ = 20703822480.

The previous prime is 21052242697. The next prime is 21052242737. The reversal of 21052242713 is 31724225012.

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 21052242713 - 2⁴ = 21052242697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21052202713) 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, 416456 + ... + 464262.

It is an arithmetic number, because the mean of its divisors is an integer number (2675096640).

Almost surely, 2^21052242713 is an apocalyptic number.

It is an amenable number.

21052242713 is a deficient number, since it is larger than the sum of its proper divisors (348530407).

21052242713 is an equidigital number, since it uses as much as digits as its factorization.

21052242713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55087.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 21052242713 its reverse (31724225012), we get a palindrome (52776467725).

The spelling of 21052242713 in words is "twenty-one billion, fifty-two million, two hundred forty-two thousand, seven hundred thirteen".