20505010045 has 32 divisors (see below), whose sum is σ = 27908697600. Its totient is φ = 14337368064.

The previous prime is 20505010021. The next prime is 20505010049. The reversal of 20505010045 is 54001050502.

It is a cyclic number.

It is not a de Polignac number, because 20505010045 - 2⁵ = 20505010013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20505009998 and 20505010025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20505010049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3137341 + ... + 3143869.

It is an arithmetic number, because the mean of its divisors is an integer number (872146800).

Almost surely, 2^20505010045 is an apocalyptic number.

It is an amenable number.

20505010045 is a deficient number, since it is larger than the sum of its proper divisors (7403687555).

20505010045 is a wasteful number, since it uses less digits than its factorization.

20505010045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9109.

The product of its (nonzero) digits is 1000, while the sum is 22.

Adding to 20505010045 its reverse (54001050502), we get a palindrome (74506060547).

The spelling of 20505010045 in words is "twenty billion, five hundred five million, ten thousand, forty-five".