20708245 has 8 divisors (see below), whose sum is σ = 25082784. Its totient is φ = 16411344.

The previous prime is 20708221. The next prime is 20708249. The reversal of 20708245 is 54280702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20708245 - 2¹⁹ = 20183957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20708249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18819 + ... + 19888.

It is an arithmetic number, because the mean of its divisors is an integer number (3135348).

Almost surely, 2^20708245 is an apocalyptic number.

It is an amenable number.

20708245 is a deficient number, since it is larger than the sum of its proper divisors (4374539).

20708245 is a wasteful number, since it uses less digits than its factorization.

20708245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38819.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20708245 is about 4550.6312748892. The cubic root of 20708245 is about 274.6087880828.

Adding to 20708245 its reverse (54280702), we get a palindrome (74988947).

The spelling of 20708245 in words is "twenty million, seven hundred eight thousand, two hundred forty-five".