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20001101 = 98320347
BaseRepresentation
bin100110001001…
…1000101001101
31101122011100112
41030103011031
520110013401
61552405405
7332002151
oct114230515
941564315
1020001101
111032113a
126846865
1341b3a93
142929061
151b513bb
hex131314d

20001101 has 4 divisors (see below), whose sum is σ = 20022432. Its totient is φ = 19979772.

The previous prime is 20001083. The next prime is 20001139. The reversal of 20001101 is 10110002.

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 20001101 - 210 = 20000077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9191 + ... + 11156.

It is an arithmetic number, because the mean of its divisors is an integer number (5005608).

Almost surely, 220001101 is an apocalyptic number.

It is an amenable number.

20001101 is a deficient number, since it is larger than the sum of its proper divisors (21331).

20001101 is an equidigital number, since it uses as much as digits as its factorization.

20001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21330.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 20001101 is about 4472.2590488477. The cubic root of 20001101 is about 271.4467425244.

Adding to 20001101 its reverse (10110002), we get a palindrome (30111103).

Multiplying 20001101 by its reverse (10110002), we get a palindrome (202211171112202).

It can be divided in two parts, 20001 and 101, that added together give a palindrome (20102).

The spelling of 20001101 in words is "twenty million, one thousand, one hundred one".

Divisors: 1 983 20347 20001101