21626366225063 has 2 divisors, whose sum is σ = 21626366225064. Its totient is φ = 21626366225062.

The previous prime is 21626366225029. The next prime is 21626366225077. The reversal of 21626366225063 is 36052266362612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21626366225063 - 2⁶ = 21626366224999 is a prime.

It is a super-2 number, since 2×21626366225063² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21626366425063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10813183112531 + 10813183112532.

It is an arithmetic number, because the mean of its divisors is an integer number (10813183112532).

Almost surely, 2^{21626366225063} is an apocalyptic number.

21626366225063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21626366225063 is an equidigital number, since it uses as much as digits as its factorization.

21626366225063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 50.

The spelling of 21626366225063 in words is "twenty-one trillion, six hundred twenty-six billion, three hundred sixty-six million, two hundred twenty-five thousand, sixty-three".