20605120606045 has 16 divisors (see below), whose sum is σ = 24753831292080. Its totient is φ = 16465648702464.

The previous prime is 20605120606033. The next prime is 20605120606079. The reversal of 20605120606045 is 54060602150602.

It can be written as a sum of positive squares in 8 ways, for example, as 115538128281 + 20489582477764 = 339909^2 + 4526542^2 .

It is a cyclic number.

It is not a de Polignac number, because 20605120606045 - 2⁵ = 20605120606013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20605120605995 and 20605120606013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16035859 + ... + 17273071.

It is an arithmetic number, because the mean of its divisors is an integer number (1547114455755).

Almost surely, 2^{20605120606045} is an apocalyptic number.

It is an amenable number.

20605120606045 is a deficient number, since it is larger than the sum of its proper divisors (4148710686035).

20605120606045 is a wasteful number, since it uses less digits than its factorization.

20605120606045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240944.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 20605120606045 its reverse (54060602150602), we get a palindrome (74665722756647).

The spelling of 20605120606045 in words is "twenty trillion, six hundred five billion, one hundred twenty million, six hundred six thousand, forty-five".