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20330442001 = 171195908353
BaseRepresentation
bin10010111011110010…
…011110110100010001
31221110212022110110101
4102323302132310101
5313114043121001
613201211532401
71316543622442
oct227362366421
957425273411
1020330442001
118693005a91
123b3475a101
131bbcca394c
14dac1412c9
157dec8ea01
hex4bbc9ed11

20330442001 has 4 divisors (see below), whose sum is σ = 21526350372. Its totient is φ = 19134533632.

The previous prime is 20330441981. The next prime is 20330442007. The reversal of 20330442001 is 10024403302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10024403302 = 25012201651.

It can be written as a sum of positive squares in 2 ways, for example, as 6687968400 + 13642473601 = 81780^2 + 116801^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330442001 - 211 = 20330439953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20330442001.

It is not an unprimeable number, because it can be changed into a prime (20330442007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597954160 + ... + 597954193.

It is an arithmetic number, because the mean of its divisors is an integer number (5381587593).

Almost surely, 220330442001 is an apocalyptic number.

It is an amenable number.

20330442001 is a deficient number, since it is larger than the sum of its proper divisors (1195908371).

20330442001 is a wasteful number, since it uses less digits than its factorization.

20330442001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195908370.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20330442001 its reverse (10024403302), we get a palindrome (30354845303).

The spelling of 20330442001 in words is "twenty billion, three hundred thirty million, four hundred forty-two thousand, one".

Divisors: 1 17 1195908353 20330442001