21335453297 has 2 divisors, whose sum is σ = 21335453298. Its totient is φ = 21335453296.

The previous prime is 21335453263. The next prime is 21335453317. The reversal of 21335453297 is 79235453312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17759293696 + 3576159601 = 133264^2 + 59801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21335453297 is a prime.

It is not a weakly prime, because it can be changed into another prime (21335458297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667726648 + 10667726649.

It is an arithmetic number, because the mean of its divisors is an integer number (10667726649).

Almost surely, 2^21335453297 is an apocalyptic number.

It is an amenable number.

21335453297 is a deficient number, since it is larger than the sum of its proper divisors (1).

21335453297 is an equidigital number, since it uses as much as digits as its factorization.

21335453297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 44.

The spelling of 21335453297 in words is "twenty-one billion, three hundred thirty-five million, four hundred fifty-three thousand, two hundred ninety-seven".