20144144399 has 4 divisors (see below), whose sum is σ = 20572743264. Its totient is φ = 19715545536.

The previous prime is 20144144369. The next prime is 20144144417. The reversal of 20144144399 is 99344144102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20144144399 - 2⁸ = 20144144143 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 (20144144369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214299362 + ... + 214299455.

It is an arithmetic number, because the mean of its divisors is an integer number (5143185816).

Almost surely, 2^20144144399 is an apocalyptic number.

20144144399 is a deficient number, since it is larger than the sum of its proper divisors (428598865).

20144144399 is an equidigital number, since it uses as much as digits as its factorization.

20144144399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428598864.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 20144144399 in words is "twenty billion, one hundred forty-four million, one hundred forty-four thousand, three hundred ninety-nine".