20222001 has 8 divisors (see below), whose sum is σ = 29958560. Its totient is φ = 13481316.

The previous prime is 20221987. The next prime is 20222003. The reversal of 20222001 is 10022202.

It is not a de Polignac number, because 20222001 - 2⁵ = 20221969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20222003) 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, 374455 + ... + 374508.

It is an arithmetic number, because the mean of its divisors is an integer number (3744820).

Almost surely, 2^20222001 is an apocalyptic number.

It is an amenable number.

20222001 is a deficient number, since it is larger than the sum of its proper divisors (9736559).

20222001 is an equidigital number, since it uses as much as digits as its factorization.

20222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748972 (or 748966 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20222001 is about 4496.8879238869. The cubic root of 20222001 is about 272.4424073781.

Adding to 20222001 its reverse (10022202), we get a palindrome (30244203).

The spelling of 20222001 in words is "twenty million, two hundred twenty-two thousand, one".