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20200813 is a prime number
BaseRepresentation
bin100110100001…
…1110101101101
31102000022022021
41031003311231
520132411223
62000550141
7333463333
oct115036555
942008267
1020200813
1110448196
126922351
134253959
14297bb53
151b9065d
hex1343d6d

20200813 has 2 divisors, whose sum is σ = 20200814. Its totient is φ = 20200812.

The previous prime is 20200801. The next prime is 20200837. The reversal of 20200813 is 31800202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14455204 + 5745609 = 3802^2 + 2397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20200813 is a prime.

20200813 is a modest number, since divided by 813 gives 202 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100406 + 10100407.

It is an arithmetic number, because the mean of its divisors is an integer number (10100407).

Almost surely, 220200813 is an apocalyptic number.

It is an amenable number.

20200813 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200813 is an equidigital number, since it uses as much as digits as its factorization.

20200813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20200813 is about 4494.5314550017. The cubic root of 20200813 is about 272.3472218260.

The spelling of 20200813 in words is "twenty million, two hundred thousand, eight hundred thirteen".