20508968 has 32 divisors (see below), whose sum is σ = 39584160. Its totient is φ = 9958080.

The previous prime is 20508941. The next prime is 20508991. The reversal of 20508968 is 86980502.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 44258 + ... + 44718.

It is an arithmetic number, because the mean of its divisors is an integer number (1237005).

Almost surely, 2^20508968 is an apocalyptic number.

It is an amenable number.

20508968 is a deficient number, since it is larger than the sum of its proper divisors (19075192).

20508968 is a wasteful number, since it uses less digits than its factorization.

20508968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 20508968 is about 4528.6828107078. The cubic root of 20508968 is about 273.7250870068.

The spelling of 20508968 in words is "twenty million, five hundred eight thousand, nine hundred sixty-eight".