Search a number
BaseRepresentation
bin100110001011…
…0000011111111
31101122210002202
41030112003333
520110411221
61552542115
7332052563
oct114260377
941583082
1020013311
111032a32a
12685193b
1341b94c6
14292d6a3
151b54d0b
hex13160ff

20013311 has 2 divisors, whose sum is σ = 20013312. Its totient is φ = 20013310.

The previous prime is 20013299. The next prime is 20013313. The reversal of 20013311 is 11331002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20013311 - 26 = 20013247 is a prime.

Together with 20013313, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20013292 and 20013301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013313) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006655 + 10006656.

It is an arithmetic number, because the mean of its divisors is an integer number (10006656).

Almost surely, 220013311 is an apocalyptic number.

20013311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013311 is an equidigital number, since it uses as much as digits as its factorization.

20013311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 20013311 is about 4473.6239225040. The cubic root of 20013311 is about 271.5019676596.

Adding to 20013311 its reverse (11331002), we get a palindrome (31344313).

The spelling of 20013311 in words is "twenty million, thirteen thousand, three hundred eleven".