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20290693 is a prime number
BaseRepresentation
bin100110101100…
…1110010000101
31102011212121011
41031121302011
520143300233
62002522221
7334316353
oct115316205
942155534
1020290693
11104a9775
126966371
134285837
1429a27d3
151bac0cd
hex1359c85

20290693 has 2 divisors, whose sum is σ = 20290694. Its totient is φ = 20290692.

The previous prime is 20290661. The next prime is 20290747. The reversal of 20290693 is 39609202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16378209 + 3912484 = 4047^2 + 1978^2 .

It is a cyclic number.

It is not a de Polignac number, because 20290693 - 25 = 20290661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20290093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10145346 + 10145347.

It is an arithmetic number, because the mean of its divisors is an integer number (10145347).

Almost surely, 220290693 is an apocalyptic number.

It is an amenable number.

20290693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20290693 is an equidigital number, since it uses as much as digits as its factorization.

20290693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 20290693 is about 4504.5191752284. The cubic root of 20290693 is about 272.7505447582.

Adding to 20290693 its reverse (39609202), we get a palindrome (59899895).

The spelling of 20290693 in words is "twenty million, two hundred ninety thousand, six hundred ninety-three".