21363425309999 has 2 divisors, whose sum is σ = 21363425310000. Its totient is φ = 21363425309998.

The previous prime is 21363425309987. The next prime is 21363425310041. The reversal of 21363425309999 is 99990352436312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21363425309999 - 2⁴ = 21363425309983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21363425309909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10681712654999 + 10681712655000.

It is an arithmetic number, because the mean of its divisors is an integer number (10681712655000).

Almost surely, 2^{21363425309999} is an apocalyptic number.

21363425309999 is a deficient number, since it is larger than the sum of its proper divisors (1).

21363425309999 is an equidigital number, since it uses as much as digits as its factorization.

21363425309999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85030560, while the sum is 65.

The spelling of 21363425309999 in words is "twenty-one trillion, three hundred sixty-three billion, four hundred twenty-five million, three hundred nine thousand, nine hundred ninety-nine".