20808948 has 24 divisors (see below), whose sum is σ = 49867552. Its totient is φ = 6748704.

The previous prime is 20808943. The next prime is 20808989. The reversal of 20808948 is 84980802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20808943) 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 7 ways as a sum of consecutive naturals, for example, 22990 + ... + 23877.

Almost surely, 2^20808948 is an apocalyptic number.

It is an amenable number.

20808948 is an abundant number, since it is smaller than the sum of its proper divisors (29058604).

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

20808948 is a wasteful number, since it uses less digits than its factorization.

20808948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46911 (or 46909 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 20808948 is about 4561.6825843103. The cubic root of 20808948 is about 275.0532040311.

The spelling of 20808948 in words is "twenty million, eight hundred eight thousand, nine hundred forty-eight".