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20072017 = 73139421
BaseRepresentation
bin100110010010…
…0011001010001
31101202202122001
41030210121101
520114301032
61554114001
7332416000
oct114443121
941682561
1020072017
111036a449
12687b901
13420a144
142946c37
151b673e7
hex1324651

20072017 has 16 divisors (see below), whose sum is σ = 23632000. Its totient is φ = 17040240.

The previous prime is 20071991. The next prime is 20072027. The reversal of 20072017 is 71027002.

It is a de Polignac number, because none of the positive numbers 2k-20072017 is a prime.

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 20072017 = 733 + 2703 = 1773 + 2443.

It is a junction number, because it is equal to n+sod(n) for n = 20071985 and 20072003.

It is not an unprimeable number, because it can be changed into a prime (20072027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47467 + ... + 47887.

It is an arithmetic number, because the mean of its divisors is an integer number (1477000).

Almost surely, 220072017 is an apocalyptic number.

It is an amenable number.

20072017 is a deficient number, since it is larger than the sum of its proper divisors (3559983).

20072017 is an equidigital number, since it uses as much as digits as its factorization.

20072017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 20072017 is about 4480.1804651152. The cubic root of 20072017 is about 271.7671784017.

Adding to 20072017 its reverse (71027002), we get a palindrome (91099019).

The spelling of 20072017 in words is "twenty million, seventy-two thousand, seventeen".

Divisors: 1 7 49 139 343 421 973 2947 6811 20629 47677 58519 144403 409633 2867431 20072017