203402332010809 has 2 divisors, whose sum is σ = 203402332010810. Its totient is φ = 203402332010808.

The previous prime is 203402332010741. The next prime is 203402332010819. The reversal of 203402332010809 is 908010233204302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189407699927209 + 13994632083600 = 13762547^2 + 3740940^2 .

It is a cyclic number.

It is not a de Polignac number, because 203402332010809 - 2⁴⁷ = 62664843655481 is a prime.

It is a super-2 number, since 2×203402332010809² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203402332010819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101701166005404 + 101701166005405.

It is an arithmetic number, because the mean of its divisors is an integer number (101701166005405).

Almost surely, 2^{203402332010809} is an apocalyptic number.

It is an amenable number.

203402332010809 is a deficient number, since it is larger than the sum of its proper divisors (1).

203402332010809 is an equidigital number, since it uses as much as digits as its factorization.

203402332010809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 203402332010809 in words is "two hundred three trillion, four hundred two billion, three hundred thirty-two million, ten thousand, eight hundred nine".