20440056450401 has 4 divisors (see below), whose sum is σ = 23360064514752. Its totient is φ = 17520048386052.

The previous prime is 20440056450391. The next prime is 20440056450449. The reversal of 20440056450401 is 10405465004402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20440056450401 - 2⁶ = 20440056450337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20440056150401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1460004032165 + ... + 1460004032178.

It is an arithmetic number, because the mean of its divisors is an integer number (5840016128688).

Almost surely, 2^{20440056450401} is an apocalyptic number.

It is an amenable number.

20440056450401 is a deficient number, since it is larger than the sum of its proper divisors (2920008064351).

20440056450401 is an equidigital number, since it uses as much as digits as its factorization.

20440056450401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920008064350.

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 20440056450401 in words is "twenty trillion, four hundred forty billion, fifty-six million, four hundred fifty thousand, four hundred one".