20601045 has 24 divisors (see below), whose sum is σ = 36676536. Its totient is φ = 10689408.

The previous prime is 20601037. The next prime is 20601079. The reversal of 20601045 is 54010602.

It is a happy number.

20601045 is a `hidden beast` number, since 20 + 601 + 0 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5716881 + 14884164 = 2391^2 + 3858^2 .

It is not a de Polignac number, because 20601045 - 2³ = 20601037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4522 + ... + 7851.

It is an arithmetic number, because the mean of its divisors is an integer number (1528189).

Almost surely, 2^20601045 is an apocalyptic number.

It is an amenable number.

20601045 is a deficient number, since it is larger than the sum of its proper divisors (16075491).

20601045 is a wasteful number, since it uses less digits than its factorization.

20601045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12421 (or 12418 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20601045 is about 4538.8374062088. The cubic root of 20601045 is about 274.1341139319.

Adding to 20601045 its reverse (54010602), we get a palindrome (74611647).

The spelling of 20601045 in words is "twenty million, six hundred one thousand, forty-five".