21337576545913 has 2 divisors, whose sum is σ = 21337576545914. Its totient is φ = 21337576545912.

The previous prime is 21337576545877. The next prime is 21337576545973. The reversal of 21337576545913 is 31954567573312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17197177714704 + 4140398831209 = 4146948^2 + 2034797^2 .

It is a cyclic number.

It is not a de Polignac number, because 21337576545913 - 2⁹ = 21337576545401 is a prime.

It is not a weakly prime, because it can be changed into another prime (21337576545973) 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 as a sum of consecutive naturals, namely, 10668788272956 + 10668788272957.

It is an arithmetic number, because the mean of its divisors is an integer number (10668788272957).

Almost surely, 2^{21337576545913} is an apocalyptic number.

It is an amenable number.

21337576545913 is a deficient number, since it is larger than the sum of its proper divisors (1).

21337576545913 is an equidigital number, since it uses as much as digits as its factorization.

21337576545913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442000, while the sum is 61.

The spelling of 21337576545913 in words is "twenty-one trillion, three hundred thirty-seven billion, five hundred seventy-six million, five hundred forty-five thousand, nine hundred thirteen".