20908424 has 16 divisors (see below), whose sum is σ = 39254220. Its totient is φ = 10440640.

The previous prime is 20908423. The next prime is 20908427. The reversal of 20908424 is 42480902.

It can be written as a sum of positive squares in 2 ways, for example, as 14303524 + 6604900 = 3782^2 + 2570^2 .

It is not an unprimeable number, because it can be changed into a prime (20908423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8342 + ... + 10554.

Almost surely, 2^20908424 is an apocalyptic number.

It is an amenable number.

20908424 is a deficient number, since it is larger than the sum of its proper divisors (18345796).

20908424 is a wasteful number, since it uses less digits than its factorization.

20908424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400 (or 3396 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20908424 is about 4572.5730174596. The cubic root of 20908424 is about 275.4907995693.

The spelling of 20908424 in words is "twenty million, nine hundred eight thousand, four hundred twenty-four".