21320060340053 has 4 divisors (see below), whose sum is σ = 21320071024320. Its totient is φ = 21320049655788.

The previous prime is 21320060340043. The next prime is 21320060340077. The reversal of 21320060340053 is 35004306002312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21320060340053 - 2¹² = 21320060335957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21320060339998 and 21320060340025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320060340013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358975 + ... + 6669852.

It is an arithmetic number, because the mean of its divisors is an integer number (5330017756080).

Almost surely, 2^{21320060340053} is an apocalyptic number.

It is an amenable number.

21320060340053 is a deficient number, since it is larger than the sum of its proper divisors (10684267).

21320060340053 is an equidigital number, since it uses as much as digits as its factorization.

21320060340053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684266.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 21320060340053 its reverse (35004306002312), we get a palindrome (56324366342365).

The spelling of 21320060340053 in words is "twenty-one trillion, three hundred twenty billion, sixty million, three hundred forty thousand, fifty-three".