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20676013 = 411014993
BaseRepresentation
bin100111011011…
…1110110101101
31102220110011021
41032313312231
520243113023
62015054141
7340512631
oct116676655
942813137
1020676013
1110742216
126b11351
13438c037
142a62dc1
151c3635d
hex13b7dad

20676013 has 8 divisors (see below), whose sum is σ = 21394296. Its totient is φ = 19968000.

The previous prime is 20675983. The next prime is 20676017. The reversal of 20676013 is 31067602.

It can be written as a sum of positive squares in 4 ways, for example, as 2125764 + 18550249 = 1458^2 + 4307^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20676013 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 (20676017) 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 7 ways as a sum of consecutive naturals, for example, 1645 + ... + 6637.

It is an arithmetic number, because the mean of its divisors is an integer number (2674287).

Almost surely, 220676013 is an apocalyptic number.

It is an amenable number.

20676013 is a deficient number, since it is larger than the sum of its proper divisors (718283).

20676013 is a wasteful number, since it uses less digits than its factorization.

20676013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5135.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20676013 is about 4547.0884090811. The cubic root of 20676013 is about 274.4662396008.

The spelling of 20676013 in words is "twenty million, six hundred seventy-six thousand, thirteen".

Divisors: 1 41 101 4141 4993 204713 504293 20676013