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20734517 is a prime number
BaseRepresentation
bin100111100011…
…0001000110101
31110000102102002
41033012020311
520302001032
62020225045
7341145326
oct117061065
943012362
1020734517
1110782171
126b3b185
1343ac85b
142a7a44d
151c48862
hex13c6235

20734517 has 2 divisors, whose sum is σ = 20734518. Its totient is φ = 20734516.

The previous prime is 20734499. The next prime is 20734531. The reversal of 20734517 is 71543702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19722481 + 1012036 = 4441^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 20734517 - 212 = 20730421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20734517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20734717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10367258 + 10367259.

It is an arithmetic number, because the mean of its divisors is an integer number (10367259).

Almost surely, 220734517 is an apocalyptic number.

It is an amenable number.

20734517 is a deficient number, since it is larger than the sum of its proper divisors (1).

20734517 is an equidigital number, since it uses as much as digits as its factorization.

20734517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20734517 is about 4553.5169923917. The cubic root of 20734517 is about 274.7248686306.

The spelling of 20734517 in words is "twenty million, seven hundred thirty-four thousand, five hundred seventeen".