20144135216 has 10 divisors (see below), whose sum is σ = 39029262012. Its totient is φ = 10072067600.

The previous prime is 20144135213. The next prime is 20144135233. The reversal of 20144135216 is 61253144102.

It is not an unprimeable number, because it can be changed into a prime (20144135213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629504210 + ... + 629504241.

Almost surely, 2^20144135216 is an apocalyptic number.

It is an amenable number.

20144135216 is a deficient number, since it is larger than the sum of its proper divisors (18885126796).

20144135216 is a wasteful number, since it uses less digits than its factorization.

20144135216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259008459 (or 1259008453 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 20144135216 its reverse (61253144102), we get a palindrome (81397279318).

The spelling of 20144135216 in words is "twenty billion, one hundred forty-four million, one hundred thirty-five thousand, two hundred sixteen".