20145430033 has 2 divisors, whose sum is σ = 20145430034. Its totient is φ = 20145430032.

The previous prime is 20145430013. The next prime is 20145430043. The reversal of 20145430033 is 33003454102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19665294289 + 480135744 = 140233^2 + 21912^2 .

It is a cyclic number.

It is not a de Polignac number, because 20145430033 - 2²⁵ = 20111875601 is a prime.

It is not a weakly prime, because it can be changed into another prime (20145430013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072715016 + 10072715017.

It is an arithmetic number, because the mean of its divisors is an integer number (10072715017).

Almost surely, 2^20145430033 is an apocalyptic number.

It is an amenable number.

20145430033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20145430033 is an equidigital number, since it uses as much as digits as its factorization.

20145430033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20145430033 its reverse (33003454102), we get a palindrome (53148884135).

The spelling of 20145430033 in words is "twenty billion, one hundred forty-five million, four hundred thirty thousand, thirty-three".