21742527772253 has 2 divisors, whose sum is σ = 21742527772254. Its totient is φ = 21742527772252.

The previous prime is 21742527772243. The next prime is 21742527772291. The reversal of 21742527772253 is 35227772524712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21663793095844 + 78734676409 = 4654438^2 + 280597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21742527772253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21742527772243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10871263886126 + 10871263886127.

It is an arithmetic number, because the mean of its divisors is an integer number (10871263886127).

Almost surely, 2^{21742527772253} is an apocalyptic number.

It is an amenable number.

21742527772253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21742527772253 is an equidigital number, since it uses as much as digits as its factorization.

21742527772253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23049600, while the sum is 56.

The spelling of 21742527772253 in words is "twenty-one trillion, seven hundred forty-two billion, five hundred twenty-seven million, seven hundred seventy-two thousand, two hundred fifty-three".