20820801 has 8 divisors (see below), whose sum is σ = 29394144. Its totient is φ = 13064000.

The previous prime is 20820797. The next prime is 20820817. The reversal of 20820801 is 10802802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20820801 - 2² = 20820797 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20820851) 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, 204075 + ... + 204176.

It is an arithmetic number, because the mean of its divisors is an integer number (3674268).

Almost surely, 2^20820801 is an apocalyptic number.

It is an amenable number.

20820801 is a deficient number, since it is larger than the sum of its proper divisors (8573343).

20820801 is a wasteful number, since it uses less digits than its factorization.

20820801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408271.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 20820801 is about 4562.9815910214. The cubic root of 20820801 is about 275.1054185368.

The spelling of 20820801 in words is "twenty million, eight hundred twenty thousand, eight hundred one".