20220001 has 4 divisors (see below), whose sum is σ = 20244400. Its totient is φ = 20195604.

The previous prime is 20219951. The next prime is 20220007. The reversal of 20220001 is 10002202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20220001 - 2¹⁹ = 19695713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20220007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10911 + ... + 12628.

It is an arithmetic number, because the mean of its divisors is an integer number (5061100).

Almost surely, 2^20220001 is an apocalyptic number.

It is an amenable number.

20220001 is a deficient number, since it is larger than the sum of its proper divisors (24399).

20220001 is an equidigital number, since it uses as much as digits as its factorization.

20220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24398.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20220001 is about 4496.6655423769. The cubic root of 20220001 is about 272.4334253659.

Adding to 20220001 its reverse (10002202), we get a palindrome (30222203).

The spelling of 20220001 in words is "twenty million, two hundred twenty thousand, one".