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BaseRepresentation
bin101001111111…
…1111110100001
31112102201202121
41103333332201
521114120001
62103544241
7355111153
oct123777641
945381677
1022020001
111147aa53
12745b081
13473c9b3
151dee6a1
hex14fffa1

22020001 has 4 divisors (see below), whose sum is σ = 22033600. Its totient is φ = 22006404.

The previous prime is 22019989. The next prime is 22020023. The reversal of 22020001 is 10002022.

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 22020001 - 25 = 22019969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22020091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3981 + ... + 7738.

It is an arithmetic number, because the mean of its divisors is an integer number (5508400).

Almost surely, 222020001 is an apocalyptic number.

It is an amenable number.

22020001 is a deficient number, since it is larger than the sum of its proper divisors (13599).

22020001 is a wasteful number, since it uses less digits than its factorization.

22020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13598.

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

The square root of 22020001 is about 4692.5473892120. The cubic root of 22020001 is about 280.2888218738.

Adding to 22020001 its reverse (10002022), we get a palindrome (32022023).

The spelling of 22020001 in words is "twenty-two million, twenty thousand, one".

Divisors: 1 1879 11719 22020001