21936343203277 has 2 divisors, whose sum is σ = 21936343203278. Its totient is φ = 21936343203276.

The previous prime is 21936343203241. The next prime is 21936343203293. The reversal of 21936343203277 is 77230234363912.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20494761168996 + 1441582034281 = 4527114^2 + 1200659^2 .

It is a cyclic number.

It is not a de Polignac number, because 21936343203277 - 2¹⁹ = 21936342678989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21936343203977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10968171601638 + 10968171601639.

It is an arithmetic number, because the mean of its divisors is an integer number (10968171601639).

Almost surely, 2^{21936343203277} is an apocalyptic number.

It is an amenable number.

21936343203277 is a deficient number, since it is larger than the sum of its proper divisors (1).

21936343203277 is an equidigital number, since it uses as much as digits as its factorization.

21936343203277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6858432, while the sum is 52.

The spelling of 21936343203277 in words is "twenty-one trillion, nine hundred thirty-six billion, three hundred forty-three million, two hundred three thousand, two hundred seventy-seven".