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20648330161577 is a prime number
BaseRepresentation
bin1001011000111100100000…
…11000100110110110101001
32201002221221122001011002022
410230132100120212312221
510201300240010132302
6111525413435314225
74230535604331026
oct454362030466651
981087848034068
1020648330161577
1166409a9091328
12239594bbab975
13b6a18aa65091
1451555515c54d
1525c19cba18a2
hex12c790626da9

20648330161577 has 2 divisors, whose sum is σ = 20648330161578. Its totient is φ = 20648330161576.

The previous prime is 20648330161483. The next prime is 20648330161649. The reversal of 20648330161577 is 77516103384602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15825470559376 + 4822859602201 = 3978124^2 + 2196101^2 .

It is a cyclic number.

It is not a de Polignac number, because 20648330161577 - 216 = 20648330096041 is a prime.

It is a super-2 number, since 2×206483301615772 (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20648330166577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10324165080788 + 10324165080789.

It is an arithmetic number, because the mean of its divisors is an integer number (10324165080789).

Almost surely, 220648330161577 is an apocalyptic number.

It is an amenable number.

20648330161577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20648330161577 is an equidigital number, since it uses as much as digits as its factorization.

20648330161577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 20648330161577 in words is "twenty trillion, six hundred forty-eight billion, three hundred thirty million, one hundred sixty-one thousand, five hundred seventy-seven".