20464808 has 32 divisors (see below), whose sum is σ = 47228160. Its totient is φ = 8095680.

The previous prime is 20464789. The next prime is 20464817. The reversal of 20464808 is 80846402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13328 + ... + 14783.

It is an arithmetic number, because the mean of its divisors is an integer number (1475880).

Almost surely, 2^20464808 is an apocalyptic number.

20464808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20464808 is an abundant number, since it is smaller than the sum of its proper divisors (26763352).

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

20464808 is a wasteful number, since it uses less digits than its factorization.

20464808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28137 (or 28133 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 20464808 is about 4523.8045934810. The cubic root of 20464808 is about 273.5284838102.

The spelling of 20464808 in words is "twenty million, four hundred sixty-four thousand, eight hundred eight".