21774826027 has 2 divisors, whose sum is σ = 21774826028. Its totient is φ = 21774826026.

The previous prime is 21774826013. The next prime is 21774826039. The reversal of 21774826027 is 72062847712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21774826027 - 2³¹ = 19627342379 is a prime.

It is a super-3 number, since 3×21774826027³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (21774827027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10887413013 + 10887413014.

It is an arithmetic number, because the mean of its divisors is an integer number (10887413014).

Almost surely, 2^21774826027 is an apocalyptic number.

21774826027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21774826027 is an equidigital number, since it uses as much as digits as its factorization.

21774826027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 526848, while the sum is 46.

The spelling of 21774826027 in words is "twenty-one billion, seven hundred seventy-four million, eight hundred twenty-six thousand, twenty-seven".