21303502695337 has 2 divisors, whose sum is σ = 21303502695338. Its totient is φ = 21303502695336.

The previous prime is 21303502695323. The next prime is 21303502695347. The reversal of 21303502695337 is 73359620530312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14600224408576 + 6703278286761 = 3821024^2 + 2589069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21303502695337 is a prime.

It is not a weakly prime, because it can be changed into another prime (21303502695347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651751347668 + 10651751347669.

It is an arithmetic number, because the mean of its divisors is an integer number (10651751347669).

Almost surely, 2^{21303502695337} is an apocalyptic number.

It is an amenable number.

21303502695337 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303502695337 is an equidigital number, since it uses as much as digits as its factorization.

21303502695337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3061800, while the sum is 49.

The spelling of 21303502695337 in words is "twenty-one trillion, three hundred three billion, five hundred two million, six hundred ninety-five thousand, three hundred thirty-seven".