Search a number
-
+
20652401209 = 113381155529
BaseRepresentation
bin10011001110111110…
…101010001000111001
31222022022010200110111
4103032332222020321
5314244003314314
613253152344321
71330533341146
oct231676521071
958268120414
1020652401209
118838818780
1240045450a1
131c418bc85b
14ddcbcd3cd
1580d189ec4
hex4cefaa239

20652401209 has 8 divisors (see below), whose sum is σ = 22530964320. Its totient is φ = 18774016800.

The previous prime is 20652401179. The next prime is 20652401257. The reversal of 20652401209 is 90210425602.

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

It is not a de Polignac number, because 20652401209 - 29 = 20652400697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20652401299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344157 + ... + 399685.

It is an arithmetic number, because the mean of its divisors is an integer number (2816370540).

Almost surely, 220652401209 is an apocalyptic number.

It is an amenable number.

20652401209 is a deficient number, since it is larger than the sum of its proper divisors (1878563111).

20652401209 is a wasteful number, since it uses less digits than its factorization.

20652401209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89351.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 20652401209 in words is "twenty billion, six hundred fifty-two million, four hundred one thousand, two hundred nine".

Divisors: 1 11 33811 55529 371921 610819 1877491019 20652401209