20324543777 has 2 divisors, whose sum is σ = 20324543778. Its totient is φ = 20324543776.

The previous prime is 20324543753. The next prime is 20324543861. The reversal of 20324543777 is 77734542302.

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., 10562906176 + 9761637601 = 102776^2 + 98801^2 .

It is a cyclic number.

It is not a de Polignac number, because 20324543777 - 2¹⁰ = 20324542753 is a prime.

It is not a weakly prime, because it can be changed into another prime (20324543717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162271888 + 10162271889.

It is an arithmetic number, because the mean of its divisors is an integer number (10162271889).

Almost surely, 2^20324543777 is an apocalyptic number.

It is an amenable number.

20324543777 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324543777 is an equidigital number, since it uses as much as digits as its factorization.

20324543777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 987840, while the sum is 44.

The spelling of 20324543777 in words is "twenty billion, three hundred twenty-four million, five hundred forty-three thousand, seven hundred seventy-seven".