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BaseRepresentation
bin100110101111…
…1001110101001
31102020000012101
41031133032221
520200004001
62003213401
7334441402
oct115371651
942200171
1020313001
1110514505
126977261
134292a37
1429aa9a9
151bb3a01
hex135f3a9

20313001 has 2 divisors, whose sum is σ = 20313002. Its totient is φ = 20313000.

The previous prime is 20312989. The next prime is 20313047. The reversal of 20313001 is 10031302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 63001 = 4500^2 + 251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20313001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20313701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156500 + 10156501.

It is an arithmetic number, because the mean of its divisors is an integer number (10156501).

Almost surely, 220313001 is an apocalyptic number.

It is an amenable number.

20313001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313001 is an equidigital number, since it uses as much as digits as its factorization.

20313001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 20313001 is about 4506.9946749469. The cubic root of 20313001 is about 272.8504639790.

Adding to 20313001 its reverse (10031302), we get a palindrome (30344303).

The spelling of 20313001 in words is "twenty million, three hundred thirteen thousand, one".