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19531003693 is a prime number
BaseRepresentation
bin10010001100001000…
…110111011100101101
31212102011000210021011
4102030020313130231
5304444414104233
612550013105221
71260665535505
oct221410673455
955364023234
1019531003693
118312819173
123950a88211
131ac3489626
14d33cc0a05
157949c90cd
hex48c23772d

19531003693 has 2 divisors, whose sum is σ = 19531003694. Its totient is φ = 19531003692.

The previous prime is 19531003637. The next prime is 19531003703. The reversal of 19531003693 is 39630013591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18150286729 + 1380716964 = 134723^2 + 37158^2 .

It is a cyclic number.

It is not a de Polignac number, because 19531003693 - 29 = 19531003181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19531003493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9765501846 + 9765501847.

It is an arithmetic number, because the mean of its divisors is an integer number (9765501847).

Almost surely, 219531003693 is an apocalyptic number.

It is an amenable number.

19531003693 is a deficient number, since it is larger than the sum of its proper divisors (1).

19531003693 is an equidigital number, since it uses as much as digits as its factorization.

19531003693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 40.

The spelling of 19531003693 in words is "nineteen billion, five hundred thirty-one million, three thousand, six hundred ninety-three".