20812201 has 8 divisors (see below), whose sum is σ = 21951680. Its totient is φ = 19677168.

The previous prime is 20812193. The next prime is 20812213. The reversal of 20812201 is 10221802.

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 20812201 - 2³ = 20812193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20812271) 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, 13660 + ... + 15106.

It is an arithmetic number, because the mean of its divisors is an integer number (2743960).

Almost surely, 2^20812201 is an apocalyptic number.

It is an amenable number.

20812201 is a deficient number, since it is larger than the sum of its proper divisors (1139479).

20812201 is a wasteful number, since it uses less digits than its factorization.

20812201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 20812201 is about 4562.0391274078. The cubic root of 20812201 is about 275.0675360298.

The spelling of 20812201 in words is "twenty million, eight hundred twelve thousand, two hundred one".