20143221444 has 36 divisors (see below), whose sum is σ = 52159483740. Its totient is φ = 6550640640.

The previous prime is 20143221407. The next prime is 20143221479. The reversal of 20143221444 is 44412234102.

20143221444 is a `hidden beast` number, since 201 + 432 + 21 + 4 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8056857600 + 12086363844 = 89760^2 + 109938^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 in 11 ways as a sum of consecutive naturals, for example, 6822109 + ... + 6825060.

Almost surely, 2^20143221444 is an apocalyptic number.

It is an amenable number.

20143221444 is an abundant number, since it is smaller than the sum of its proper divisors (32016262296).

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

20143221444 is a wasteful number, since it uses less digits than its factorization.

20143221444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13647220 (or 13647215 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 20143221444 its reverse (44412234102), we get a palindrome (64555455546).

The spelling of 20143221444 in words is "twenty billion, one hundred forty-three million, two hundred twenty-one thousand, four hundred forty-four".