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20648233 is a prime number
BaseRepresentation
bin100111011000…
…1000100101001
31102212001001101
41032301010221
520241220413
62014321401
7340335634
oct116610451
942761041
1020648233
1110723361
126ab9261
13437c4b8
142a56c1b
151c2cedd
hex13b1129

20648233 has 2 divisors, whose sum is σ = 20648234. Its totient is φ = 20648232.

The previous prime is 20648219. The next prime is 20648237. The reversal of 20648233 is 33284602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13741849 + 6906384 = 3707^2 + 2628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20648233 is a prime.

It is not a weakly prime, because it can be changed into another prime (20648237) 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 as a sum of consecutive naturals, namely, 10324116 + 10324117.

It is an arithmetic number, because the mean of its divisors is an integer number (10324117).

Almost surely, 220648233 is an apocalyptic number.

It is an amenable number.

20648233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20648233 is an equidigital number, since it uses as much as digits as its factorization.

20648233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20648233 is about 4544.0326803402. The cubic root of 20648233 is about 274.3432615152.

The spelling of 20648233 in words is "twenty million, six hundred forty-eight thousand, two hundred thirty-three".