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20070841 = 72409609
BaseRepresentation
bin100110010010…
…0000110111001
31101202201000111
41030210012321
520114231331
61554104321
7332412400
oct114440671
941681014
1020070841
111036957a
12687b0a1
13420974b
142946637
151b66db1
hex13241b9

20070841 has 6 divisors (see below), whose sum is σ = 23347770. Its totient is φ = 17203536.

The previous prime is 20070823. The next prime is 20070877. The reversal of 20070841 is 14807002.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 441 = 4480^2 + 21^2 .

It is not a de Polignac number, because 20070841 - 217 = 19939769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20079841) 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 5 ways as a sum of consecutive naturals, for example, 204756 + ... + 204853.

It is an arithmetic number, because the mean of its divisors is an integer number (3891295).

Almost surely, 220070841 is an apocalyptic number.

It is an amenable number.

20070841 is a deficient number, since it is larger than the sum of its proper divisors (3276929).

20070841 is an equidigital number, since it uses as much as digits as its factorization.

20070841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409623 (or 409616 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20070841 is about 4480.0492184796. The cubic root of 20070841 is about 271.7618707729.

Adding to 20070841 its reverse (14807002), we get a palindrome (34877843).

The spelling of 20070841 in words is "twenty million, seventy thousand, eight hundred forty-one".

Divisors: 1 7 49 409609 2867263 20070841