20283499409 has 2 divisors, whose sum is σ = 20283499410. Its totient is φ = 20283499408.

The previous prime is 20283499387. The next prime is 20283499433. The reversal of 20283499409 is 90499438202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17358853009 + 2924646400 = 131753^2 + 54080^2 .

It is a cyclic number.

It is not a de Polignac number, because 20283499409 - 2¹² = 20283495313 is a prime.

It is a super-2 number, since 2×20283499409² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20283499009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10141749704 + 10141749705.

It is an arithmetic number, because the mean of its divisors is an integer number (10141749705).

Almost surely, 2^20283499409 is an apocalyptic number.

It is an amenable number.

20283499409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20283499409 is an equidigital number, since it uses as much as digits as its factorization.

20283499409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 20283499409 in words is "twenty billion, two hundred eighty-three million, four hundred ninety-nine thousand, four hundred nine".