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20113131313 = 111828466483
BaseRepresentation
bin10010101110110101…
…100000011100110001
31220220201101221020101
4102232311200130301
5312142430200223
613123450112401
71311264536542
oct225665403461
956821357211
1020113131313
11859137a280
123a93a1b701
131b86c68342
14d8b3344c9
157cab664ad
hex4aed60731

20113131313 has 4 divisors (see below), whose sum is σ = 21941597808. Its totient is φ = 18284664820.

The previous prime is 20113131301. The next prime is 20113131317. The reversal of 20113131313 is 31313131102.

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 a de Polignac number, because none of the positive numbers 2k-20113131313 is a prime.

It is a super-2 number, since 2×201131313132 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113131317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914233231 + ... + 914233252.

It is an arithmetic number, because the mean of its divisors is an integer number (5485399452).

Almost surely, 220113131313 is an apocalyptic number.

It is an amenable number.

20113131313 is a deficient number, since it is larger than the sum of its proper divisors (1828466495).

20113131313 is a wasteful number, since it uses less digits than its factorization.

20113131313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828466494.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 20113131313 its reverse (31313131102), we get a palindrome (51426262415).

The spelling of 20113131313 in words is "twenty billion, one hundred thirteen million, one hundred thirty-one thousand, three hundred thirteen".

Divisors: 1 11 1828466483 20113131313