20144243252 has 24 divisors (see below), whose sum is σ = 40370568000. Its totient is φ = 8615658240.

The previous prime is 20144243191. The next prime is 20144243257. The reversal of 20144243252 is 25234244102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144243257) 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 7 ways as a sum of consecutive naturals, for example, 718877 + ... + 746372.

It is an arithmetic number, because the mean of its divisors is an integer number (1682107000).

Almost surely, 2^20144243252 is an apocalyptic number.

It is an amenable number.

20144243252 is an abundant number, since it is smaller than the sum of its proper divisors (20226324748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20144243252 is a wasteful number, since it uses less digits than its factorization.

20144243252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465751 (or 1465749 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 20144243252 its reverse (25234244102), we get a palindrome (45378487354).

The spelling of 20144243252 in words is "twenty billion, one hundred forty-four million, two hundred forty-three thousand, two hundred fifty-two".