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20130010097 = 171993759393
BaseRepresentation
bin10010101111110101…
…111001001111110001
31220221220011110120112
4102233311321033301
5312211240310342
613125251551105
71311561156041
oct225765711761
956856143515
1020130010097
11859a95858a
123a995bb495
131b8a5c7ba2
14d8d689721
157cc39c682
hex4afd793f1

20130010097 has 8 divisors (see below), whose sum is σ = 21315556296. Its totient is φ = 18944622592.

The previous prime is 20130010079. The next prime is 20130010139. The reversal of 20130010097 is 79001003102.

It can be written as a sum of positive squares in 4 ways, for example, as 869011441 + 19260998656 = 29479^2 + 138784^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20130010097 - 28 = 20130009841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20130010597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309233 + ... + 368625.

It is an arithmetic number, because the mean of its divisors is an integer number (2664444537).

Almost surely, 220130010097 is an apocalyptic number.

It is an amenable number.

20130010097 is a deficient number, since it is larger than the sum of its proper divisors (1185546199).

20130010097 is a wasteful number, since it uses less digits than its factorization.

20130010097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79347.

The product of its (nonzero) digits is 378, while the sum is 23.

Adding to 20130010097 its reverse (79001003102), we get a palindrome (99131013199).

The spelling of 20130010097 in words is "twenty billion, one hundred thirty million, ten thousand, ninety-seven".

Divisors: 1 17 19937 59393 338929 1009681 1184118241 20130010097