20565544045 has 32 divisors (see below), whose sum is σ = 27749278080. Its totient is φ = 14539714560.

The previous prime is 20565544033. The next prime is 20565544091. The reversal of 20565544045 is 54044556502.

It is a happy number.

It is not a de Polignac number, because 20565544045 - 2⁷ = 20565543917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20565543989 and 20565544007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126150 + ... + 238840.

It is an arithmetic number, because the mean of its divisors is an integer number (867164940).

Almost surely, 2^20565544045 is an apocalyptic number.

It is an amenable number.

20565544045 is a deficient number, since it is larger than the sum of its proper divisors (7183734035).

20565544045 is a wasteful number, since it uses less digits than its factorization.

20565544045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112845.

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 20565544045 in words is "twenty billion, five hundred sixty-five million, five hundred forty-four thousand, forty-five".