20322545449 has 4 divisors (see below), whose sum is σ = 20323297540. Its totient is φ = 20321793360.

The previous prime is 20322545389. The next prime is 20322545489. The reversal of 20322545449 is 94454522302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12903824025 + 7418721424 = 113595^2 + 86132^2 .

It is a cyclic number.

It is not a de Polignac number, because 20322545449 - 2¹⁷ = 20322414377 is a prime.

It is a super-2 number, since 2×20322545449² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20322545489) 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 in 3 ways as a sum of consecutive naturals, for example, 333942 + ... + 390079.

It is an arithmetic number, because the mean of its divisors is an integer number (5080824385).

Almost surely, 2^20322545449 is an apocalyptic number.

It is an amenable number.

20322545449 is a deficient number, since it is larger than the sum of its proper divisors (752091).

20322545449 is an equidigital number, since it uses as much as digits as its factorization.

20322545449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752090.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 20322545449 in words is "twenty billion, three hundred twenty-two million, five hundred forty-five thousand, four hundred forty-nine".