20444313521403 has 20 divisors (see below), whose sum is σ = 30544690733568. Its totient is φ = 13627569822480.

The previous prime is 20444313521287. The next prime is 20444313521449. The reversal of 20444313521403 is 30412531344402.

20444313521403 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 431 + 3 + 5 + 214 + 0 + 3 = 666.

It is not a de Polignac number, because 20444313521403 - 2³² = 20440018554107 is a prime.

It is a super-2 number, since 2×20444313521403² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20444313511403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17700876 + ... + 18820457.

Almost surely, 2^{20444313521403} is an apocalyptic number.

20444313521403 is a deficient number, since it is larger than the sum of its proper divisors (10100377212165).

20444313521403 is an equidigital number, since it uses as much as digits as its factorization.

20444313521403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36528256 (or 36528247 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 20444313521403 its reverse (30412531344402), we get a palindrome (50856844865805).

The spelling of 20444313521403 in words is "twenty trillion, four hundred forty-four billion, three hundred thirteen million, five hundred twenty-one thousand, four hundred three".