20908396 has 12 divisors (see below), whose sum is σ = 36793120. Its totient is φ = 10396080.

The previous prime is 20908339. The next prime is 20908397. The reversal of 20908396 is 69380902.

It is a super-2 number, since 2×20908396² = 874322046585632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20908397) 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, 13716 + ... + 15163.

Almost surely, 2^20908396 is an apocalyptic number.

It is an amenable number.

20908396 is a deficient number, since it is larger than the sum of its proper divisors (15884724).

20908396 is a wasteful number, since it uses less digits than its factorization.

20908396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29064 (or 29062 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 20908396 is about 4572.5699557251. The cubic root of 20908396 is about 275.4906765927.

The spelling of 20908396 in words is "twenty million, nine hundred eight thousand, three hundred ninety-six".