20802001 has 8 divisors (see below), whose sum is σ = 22814208. Its totient is φ = 18810000.

The previous prime is 20801993. The next prime is 20802011. The reversal of 20802001 is 10020802.

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

It is not a de Polignac number, because 20802001 - 2³ = 20801993 is a prime.

It is a super-3 number, since 3×20802001³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20802011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2850 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (2851776).

Almost surely, 2^20802001 is an apocalyptic number.

It is an amenable number.

20802001 is a deficient number, since it is larger than the sum of its proper divisors (2012207).

20802001 is a wasteful number, since it uses less digits than its factorization.

20802001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10103.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 20802001 is about 4560.9210692578. The cubic root of 20802001 is about 275.0225920833.

Adding to 20802001 its reverse (10020802), we get a palindrome (30822803).

The spelling of 20802001 in words is "twenty million, eight hundred two thousand, one".