20445012426513 has 16 divisors (see below), whose sum is σ = 27417966229440. Its totient is φ = 13551035623104.

The previous prime is 20445012426493. The next prime is 20445012426523. The reversal of 20445012426513 is 31562421054402.

It is not a de Polignac number, because 20445012426513 - 2⁴⁰ = 19345500798737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20445012426523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44641278 + ... + 45096936.

It is an arithmetic number, because the mean of its divisors is an integer number (1713622889340).

Almost surely, 2^{20445012426513} is an apocalyptic number.

It is an amenable number.

20445012426513 is a deficient number, since it is larger than the sum of its proper divisors (6972953802927).

20445012426513 is a wasteful number, since it uses less digits than its factorization.

20445012426513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542288.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 20445012426513 in words is "twenty trillion, four hundred forty-five billion, twelve million, four hundred twenty-six thousand, five hundred thirteen".