20804960 has 48 divisors (see below), whose sum is σ = 53624592. Its totient is φ = 7564800.

The previous prime is 20804951. The next prime is 20804963. The reversal of 20804960 is 6940802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20804963) 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, 4151 + ... + 7670.

It is an arithmetic number, because the mean of its divisors is an integer number (1117179).

Almost surely, 2^20804960 is an apocalyptic number.

20804960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20804960 is an abundant number, since it is smaller than the sum of its proper divisors (32819632).

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

20804960 is a wasteful number, since it uses less digits than its factorization.

20804960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11847 (or 11839 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20804960 is about 4561.2454439550. The cubic root of 20804960 is about 275.0356317466.

The spelling of 20804960 in words is "twenty million, eight hundred four thousand, nine hundred sixty".