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20502049 is a prime number
BaseRepresentation
bin100111000110…
…1011000100001
31102120121112011
41032031120201
520222031144
62011232521
7336156511
oct116153041
942517464
1020502049
1110633547
126a48741
13432aab9
142a19841
151beea34
hex138d621

20502049 has 2 divisors, whose sum is σ = 20502050. Its totient is φ = 20502048.

The previous prime is 20502023. The next prime is 20502059. The reversal of 20502049 is 94020502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 431649 = 4480^2 + 657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20502049 is a prime.

It is not a weakly prime, because it can be changed into another prime (20502019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251024 + 10251025.

It is an arithmetic number, because the mean of its divisors is an integer number (10251025).

Almost surely, 220502049 is an apocalyptic number.

It is an amenable number.

20502049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502049 is an equidigital number, since it uses as much as digits as its factorization.

20502049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20502049 is about 4527.9188376118. The cubic root of 20502049 is about 273.6943018254.

The spelling of 20502049 in words is "twenty million, five hundred two thousand, forty-nine".