Search a number
-
+
20208651 = 323292879
BaseRepresentation
bin100110100010…
…1110000001011
31102000201001120
41031011300023
520133134101
62001050323
7333525231
oct115056013
942021046
1020208651
1110453071
1269269a3
1342573a8
142980951
151b92b36
hex1345c0b

20208651 has 8 divisors (see below), whose sum is σ = 28116480. Its totient is φ = 12886632.

The previous prime is 20208641. The next prime is 20208691. The reversal of 20208651 is 15680202.

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

It is not a de Polignac number, because 20208651 - 25 = 20208619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20208611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146371 + ... + 146508.

It is an arithmetic number, because the mean of its divisors is an integer number (3514560).

Almost surely, 220208651 is an apocalyptic number.

20208651 is a deficient number, since it is larger than the sum of its proper divisors (7907829).

20208651 is a wasteful number, since it uses less digits than its factorization.

20208651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292905.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 20208651 is about 4495.4033189470. The cubic root of 20208651 is about 272.3824412254.

Adding to 20208651 its reverse (15680202), we get a palindrome (35888853).

The spelling of 20208651 in words is "twenty million, two hundred eight thousand, six hundred fifty-one".

Divisors: 1 3 23 69 292879 878637 6736217 20208651