21026102668573 has 2 divisors, whose sum is σ = 21026102668574. Its totient is φ = 21026102668572.

The previous prime is 21026102668463. The next prime is 21026102668603. The reversal of 21026102668573 is 37586620162012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21026012380569 + 90288004 = 4585413^2 + 9502^2 .

It is a cyclic number.

It is not a de Polignac number, because 21026102668573 - 2³³ = 21017512733981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21026102668673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10513051334286 + 10513051334287.

It is an arithmetic number, because the mean of its divisors is an integer number (10513051334287).

Almost surely, 2^{21026102668573} is an apocalyptic number.

It is an amenable number.

21026102668573 is a deficient number, since it is larger than the sum of its proper divisors (1).

21026102668573 is an equidigital number, since it uses as much as digits as its factorization.

21026102668573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 21026102668573 in words is "twenty-one trillion, twenty-six billion, one hundred two million, six hundred sixty-eight thousand, five hundred seventy-three".