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20011220093 is a prime number
BaseRepresentation
bin10010101000110000…
…101111110001111101
31220122121122022022202
4102220300233301331
5311440333020333
613105405521245
71305616364354
oct225060576175
956577568282
1020011220093
1185398a2927
123a65873225
131b6bb05947
14d7b9a699b
157c1c355e8
hex4a8c2fc7d

20011220093 has 2 divisors, whose sum is σ = 20011220094. Its totient is φ = 20011220092.

The previous prime is 20011220083. The next prime is 20011220113. The reversal of 20011220093 is 39002211002.

It is an a-pointer prime, because the next prime (20011220113) can be obtained adding 20011220093 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16780093444 + 3231126649 = 129538^2 + 56843^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011220093 - 26 = 20011220029 is a prime.

It is a super-2 number, since 2×200112200932 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011220063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005610046 + 10005610047.

It is an arithmetic number, because the mean of its divisors is an integer number (10005610047).

Almost surely, 220011220093 is an apocalyptic number.

It is an amenable number.

20011220093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011220093 is an equidigital number, since it uses as much as digits as its factorization.

20011220093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20011220093 its reverse (39002211002), we get a palindrome (59013431095).

The spelling of 20011220093 in words is "twenty billion, eleven million, two hundred twenty thousand, ninety-three".