21302445245507 has 2 divisors, whose sum is σ = 21302445245508. Its totient is φ = 21302445245506.

The previous prime is 21302445245423. The next prime is 21302445245539. The reversal of 21302445245507 is 70554254420312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21302445245507 - 2³² = 21298150278211 is a prime.

It is not a weakly prime, because it can be changed into another prime (21302445245407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651222622753 + 10651222622754.

It is an arithmetic number, because the mean of its divisors is an integer number (10651222622754).

Almost surely, 2^{21302445245507} is an apocalyptic number.

21302445245507 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302445245507 is an equidigital number, since it uses as much as digits as its factorization.

21302445245507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344000, while the sum is 44.

Adding to 21302445245507 its reverse (70554254420312), we get a palindrome (91856699665819).

The spelling of 21302445245507 in words is "twenty-one trillion, three hundred two billion, four hundred forty-five million, two hundred forty-five thousand, five hundred seven".