20444544561464 has 8 divisors (see below), whose sum is σ = 38333521052760. Its totient is φ = 10222272280728.

The previous prime is 20444544561449. The next prime is 20444544561517. The reversal of 20444544561464 is 46416544544402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277784035084 + ... + 1277784035099.

It is an arithmetic number, because the mean of its divisors is an integer number (4791690131595).

Almost surely, 2^{20444544561464} is an apocalyptic number.

It is an amenable number.

20444544561464 is a deficient number, since it is larger than the sum of its proper divisors (17888976491296).

20444544561464 is a wasteful number, since it uses less digits than its factorization.

20444544561464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555568070189 (or 2555568070185 counting only the distinct ones).

The product of its (nonzero) digits is 29491200, while the sum is 53.

The spelling of 20444544561464 in words is "twenty trillion, four hundred forty-four billion, five hundred forty-four million, five hundred sixty-one thousand, four hundred sixty-four".