20320242433 has 2 divisors, whose sum is σ = 20320242434. Its totient is φ = 20320242432.

The previous prime is 20320242427. The next prime is 20320242457. The reversal of 20320242433 is 33424202302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18661472449 + 1658769984 = 136607^2 + 40728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20320242433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20320242398 and 20320242407.

It is not a weakly prime, because it can be changed into another prime (20320242413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160121216 + 10160121217.

It is an arithmetic number, because the mean of its divisors is an integer number (10160121217).

Almost surely, 2^20320242433 is an apocalyptic number.

It is an amenable number.

20320242433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320242433 is an equidigital number, since it uses as much as digits as its factorization.

20320242433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 20320242433 its reverse (33424202302), we get a palindrome (53744444735).

The spelling of 20320242433 in words is "twenty billion, three hundred twenty million, two hundred forty-two thousand, four hundred thirty-three".