20951208 has 48 divisors (see below), whose sum is σ = 60084180. Its totient is φ = 6572544.

The previous prime is 20951201. The next prime is 20951209. The reversal of 20951208 is 80215902.

It can be written as a sum of positive squares in 2 ways, for example, as 19873764 + 1077444 = 4458^2 + 1038^2 .

It is not an unprimeable number, because it can be changed into a prime (20951201) 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 11 ways as a sum of consecutive naturals, for example, 7335 + ... + 9782.

Almost surely, 2^20951208 is an apocalyptic number.

It is an amenable number.

20951208 is an abundant number, since it is smaller than the sum of its proper divisors (39132972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20951208 is a wasteful number, since it uses less digits than its factorization.

20951208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17146 (or 17139 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20951208 is about 4577.2489554316. The cubic root of 20951208 is about 275.6785798316.

The spelling of 20951208 in words is "twenty million, nine hundred fifty-one thousand, two hundred eight".