21144545327 has 2 divisors, whose sum is σ = 21144545328. Its totient is φ = 21144545326.

The previous prime is 21144545281. The next prime is 21144545353. The reversal of 21144545327 is 72354544112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21144545327 - 2⁶ = 21144545263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21144545027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572272663 + 10572272664.

It is an arithmetic number, because the mean of its divisors is an integer number (10572272664).

Almost surely, 2^21144545327 is an apocalyptic number.

21144545327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144545327 is an equidigital number, since it uses as much as digits as its factorization.

21144545327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 38.

The spelling of 21144545327 in words is "twenty-one billion, one hundred forty-four million, five hundred forty-five thousand, three hundred twenty-seven".