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21010000000019 is a prime number
BaseRepresentation
bin1001100011011110001011…
…00101100011010000010011
32202101112111000122120021212
410301233011211203100103
510223211440000000034
6112403505531210335
74265631246252632
oct461570545432023
982345430576255
1021010000000019
1167703222a7a58
122433a665a69ab
13b95308269a44
14528c64827519
152667b94aa2ce
hex131bc5963413

21010000000019 has 2 divisors, whose sum is σ = 21010000000020. Its totient is φ = 21010000000018.

The previous prime is 21009999999931. The next prime is 21010000000057. The reversal of 21010000000019 is 91000000001012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21010000000019 - 224 = 21009983222803 is a prime.

It is a super-2 number, since 2×210100000000192 (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21009999999940 and 21010000000012.

It is not a weakly prime, because it can be changed into another prime (21010000000219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505000000009 + 10505000000010.

It is an arithmetic number, because the mean of its divisors is an integer number (10505000000010).

Almost surely, 221010000000019 is an apocalyptic number.

21010000000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010000000019 is an equidigital number, since it uses as much as digits as its factorization.

21010000000019 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 14.

The spelling of 21010000000019 in words is "twenty-one trillion, ten billion, nineteen", and thus it is an aban number and an uban number.