20144455727 has 16 divisors (see below), whose sum is σ = 22823769600. Its totient is φ = 17619685440.

The previous prime is 20144455703. The next prime is 20144455729. The reversal of 20144455727 is 72755444102.

It is a cyclic number.

It is not a de Polignac number, because 20144455727 - 2¹⁶ = 20144390191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144455729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299702 + ... + 360707.

It is an arithmetic number, because the mean of its divisors is an integer number (1426485600).

Almost surely, 2^20144455727 is an apocalyptic number.

20144455727 is a deficient number, since it is larger than the sum of its proper divisors (2679313873).

20144455727 is a wasteful number, since it uses less digits than its factorization.

20144455727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660526.

The product of its (nonzero) digits is 313600, while the sum is 41.

Adding to 20144455727 its reverse (72755444102), we get a palindrome (92899899829).

The spelling of 20144455727 in words is "twenty billion, one hundred forty-four million, four hundred fifty-five thousand, seven hundred twenty-seven".