20045707 has 6 divisors (see below), whose sum is σ = 22033844. Its totient is φ = 18223260.

The previous prime is 20045687. The next prime is 20045717. The reversal of 20045707 is 70754002.

It is not a de Polignac number, because 20045707 - 2¹⁵ = 20012939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20045717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82713 + ... + 82954.

Almost surely, 2^20045707 is an apocalyptic number.

20045707 is a deficient number, since it is larger than the sum of its proper divisors (1988137).

20045707 is a wasteful number, since it uses less digits than its factorization.

20045707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165689 (or 165678 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 20045707 is about 4477.2432366357. The cubic root of 20045707 is about 271.6483841478.

Adding to 20045707 its reverse (70754002), we get a palindrome (90799709).

The spelling of 20045707 in words is "twenty million, forty-five thousand, seven hundred seven".