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20411711 = 25779423
BaseRepresentation
bin100110111011…
…1010100111111
31102102000121022
41031313110333
520211133321
62005254355
7335332235
oct115672477
942360538
1020411711
1110581691
126a043bb
1342c8948
1429d4955
151bd2dab
hex137753f

20411711 has 4 divisors (see below), whose sum is σ = 20491392. Its totient is φ = 20332032.

The previous prime is 20411707. The next prime is 20411717. The reversal of 20411711 is 11711402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20411711 - 22 = 20411707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20411711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411717) 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, 39455 + ... + 39968.

It is an arithmetic number, because the mean of its divisors is an integer number (5122848).

Almost surely, 220411711 is an apocalyptic number.

20411711 is a deficient number, since it is larger than the sum of its proper divisors (79681).

20411711 is an equidigital number, since it uses as much as digits as its factorization.

20411711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79680.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 20411711 is about 4517.9321597386. The cubic root of 20411711 is about 273.2917176711.

The spelling of 20411711 in words is "twenty million, four hundred eleven thousand, seven hundred eleven".

Divisors: 1 257 79423 20411711