20454330409 has 2 divisors, whose sum is σ = 20454330410. Its totient is φ = 20454330408.

The previous prime is 20454330401. The next prime is 20454330427. The reversal of 20454330409 is 90403345402.

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., 15775360000 + 4678970409 = 125600^2 + 68403^2 .

It is a cyclic number.

It is not a de Polignac number, because 20454330409 - 2³ = 20454330401 is a prime.

It is not a weakly prime, because it can be changed into another prime (20454330401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227165204 + 10227165205.

It is an arithmetic number, because the mean of its divisors is an integer number (10227165205).

Almost surely, 2^20454330409 is an apocalyptic number.

It is an amenable number.

20454330409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454330409 is an equidigital number, since it uses as much as digits as its factorization.

20454330409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 20454330409 in words is "twenty billion, four hundred fifty-four million, three hundred thirty thousand, four hundred nine".