Search a number
-
+
20916341 = 171230373
BaseRepresentation
bin100111111001…
…0100001110101
31110100122211022
41033302201311
520323310331
62024150525
7342533405
oct117624165
943318738
1020916341
1110896836
127008445
134444544
142ac6805
151c8267b
hex13f2875

20916341 has 4 divisors (see below), whose sum is σ = 22146732. Its totient is φ = 19685952.

The previous prime is 20916331. The next prime is 20916349. The reversal of 20916341 is 14361902.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7447441 + 13468900 = 2729^2 + 3670^2 .

It is a cyclic number.

It is not a de Polignac number, because 20916341 - 210 = 20915317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20916341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20916349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615170 + ... + 615203.

It is an arithmetic number, because the mean of its divisors is an integer number (5536683).

Almost surely, 220916341 is an apocalyptic number.

It is an amenable number.

20916341 is a deficient number, since it is larger than the sum of its proper divisors (1230391).

20916341 is a wasteful number, since it uses less digits than its factorization.

20916341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230390.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20916341 is about 4573.4386406729. The cubic root of 20916341 is about 275.5255668228.

The spelling of 20916341 in words is "twenty million, nine hundred sixteen thousand, three hundred forty-one".

Divisors: 1 17 1230373 20916341