20144311623 has 12 divisors (see below), whose sum is σ = 29379838800. Its totient is φ = 13299156576.

The previous prime is 20144311571. The next prime is 20144311639. The reversal of 20144311623 is 32611344102.

It is a happy number.

20144311623 is a `hidden beast` number, since 2 + 0 + 1 + 4 + 4 + 31 + 1 + 623 = 666.

It is not a de Polignac number, because 20144311623 - 2⁹ = 20144311111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144311643) 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 in 11 ways as a sum of consecutive naturals, for example, 10864398 + ... + 10866251.

It is an arithmetic number, because the mean of its divisors is an integer number (2448319900).

Almost surely, 2^20144311623 is an apocalyptic number.

20144311623 is a deficient number, since it is larger than the sum of its proper divisors (9235527177).

20144311623 is a wasteful number, since it uses less digits than its factorization.

20144311623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21730758 (or 21730755 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 20144311623 its reverse (32611344102), we get a palindrome (52755655725).

The spelling of 20144311623 in words is "twenty billion, one hundred forty-four million, three hundred eleven thousand, six hundred twenty-three".