20445052465121 has 4 divisors (see below), whose sum is σ = 20567477929152. Its totient is φ = 20322627001092.

The previous prime is 20445052465009. The next prime is 20445052465127. The reversal of 20445052465121 is 12156425054402.

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 20445052465121 - 2²² = 20445048270817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20445052465127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61212731765 + ... + 61212732098.

It is an arithmetic number, because the mean of its divisors is an integer number (5141869482288).

Almost surely, 2^{20445052465121} is an apocalyptic number.

It is an amenable number.

20445052465121 is a deficient number, since it is larger than the sum of its proper divisors (122425464031).

20445052465121 is a wasteful number, since it uses less digits than its factorization.

20445052465121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122425464030.

The product of its (nonzero) digits is 384000, while the sum is 41.

The spelling of 20445052465121 in words is "twenty trillion, four hundred forty-five billion, fifty-two million, four hundred sixty-five thousand, one hundred twenty-one".