20920708 has 12 divisors (see below), whose sum is σ = 38203200. Its totient is φ = 10005512.

The previous prime is 20920703. The next prime is 20920723. The reversal of 20920708 is 80702902.

It is not an unprimeable number, because it can be changed into a prime (20920703) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 113608 + ... + 113791.

It is an arithmetic number, because the mean of its divisors is an integer number (3183600).

Almost surely, 2^20920708 is an apocalyptic number.

It is an amenable number.

20920708 is a deficient number, since it is larger than the sum of its proper divisors (17282492).

20920708 is a wasteful number, since it uses less digits than its factorization.

20920708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227426 (or 227424 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 20920708 is about 4573.9160464530. The cubic root of 20920708 is about 275.5447406102.

The spelling of 20920708 in words is "twenty million, nine hundred twenty thousand, seven hundred eight".