21900797366353 has 2 divisors, whose sum is σ = 21900797366354. Its totient is φ = 21900797366352.

The previous prime is 21900797366347. The next prime is 21900797366447. The reversal of 21900797366353 is 35366379700912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21891328519489 + 9468846864 = 4678817^2 + 97308^2 .

It is a cyclic number.

It is not a de Polignac number, because 21900797366353 - 2²⁹ = 21900260495441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21900797366291 and 21900797366300.

It is not a weakly prime, because it can be changed into another prime (21900797366333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10950398683176 + 10950398683177.

It is an arithmetic number, because the mean of its divisors is an integer number (10950398683177).

Almost surely, 2^{21900797366353} is an apocalyptic number.

It is an amenable number.

21900797366353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21900797366353 is an equidigital number, since it uses as much as digits as its factorization.

21900797366353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38578680, while the sum is 61.

The spelling of 21900797366353 in words is "twenty-one trillion, nine hundred billion, seven hundred ninety-seven million, three hundred sixty-six thousand, three hundred fifty-three".