20968908 has 24 divisors (see below), whose sum is σ = 49304640. Its totient is φ = 6935760.

The previous prime is 20968901. The next prime is 20968949. The reversal of 20968908 is 80986902.

It is a self number, because there is not a number n which added to its sum of digits gives 20968908.

It is not an unprimeable number, because it can be changed into a prime (20968901) 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, 5098 + ... + 8241.

It is an arithmetic number, because the mean of its divisors is an integer number (2054360).

Almost surely, 2^20968908 is an apocalyptic number.

It is an amenable number.

20968908 is an abundant number, since it is smaller than the sum of its proper divisors (28335732).

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

20968908 is a wasteful number, since it uses less digits than its factorization.

20968908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13477 (or 13475 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 20968908 is about 4579.1820230255. The cubic root of 20968908 is about 275.7561909079.

The spelling of 20968908 in words is "twenty million, nine hundred sixty-eight thousand, nine hundred eight".