20144423444 has 6 divisors (see below), whose sum is σ = 35252741034. Its totient is φ = 10072211720.

The previous prime is 20144423401. The next prime is 20144423483. The reversal of 20144423444 is 44432444102.

It can be written as a sum of positive squares in only one way, i.e., 12530115844 + 7614307600 = 111938^2 + 87260^2 .

It is a super-2 number, since 2×20144423444² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20144423444.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2518052927 + ... + 2518052934.

It is an arithmetic number, because the mean of its divisors is an integer number (5875456839).

Almost surely, 2^20144423444 is an apocalyptic number.

It is an amenable number.

20144423444 is a deficient number, since it is larger than the sum of its proper divisors (15108317590).

20144423444 is a wasteful number, since it uses less digits than its factorization.

20144423444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036105865 (or 5036105863 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 20144423444 its reverse (44432444102), we get a palindrome (64576867546).

The spelling of 20144423444 in words is "twenty billion, one hundred forty-four million, four hundred twenty-three thousand, four hundred forty-four".