20444143305901 has 16 divisors (see below), whose sum is σ = 25407756573696. Its totient is φ = 16047004144896.

The previous prime is 20444143305899. The next prime is 20444143305917. The reversal of 20444143305901 is 10950334144402.

It is not a de Polignac number, because 20444143305901 - 2¹ = 20444143305899 is a prime.

It is a super-2 number, since 2×20444143305901² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444143305941) 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 15 ways as a sum of consecutive naturals, for example, 2321610781 + ... + 2321619586.

It is an arithmetic number, because the mean of its divisors is an integer number (1587984785856).

Almost surely, 2^{20444143305901} is an apocalyptic number.

It is an amenable number.

20444143305901 is a deficient number, since it is larger than the sum of its proper divisors (4963613267795).

20444143305901 is a wasteful number, since it uses less digits than its factorization.

20444143305901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4643230428.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 20444143305901 in words is "twenty trillion, four hundred forty-four billion, one hundred forty-three million, three hundred five thousand, nine hundred one".