20242551289 has 2 divisors, whose sum is σ = 20242551290. Its totient is φ = 20242551288.

The previous prime is 20242551257. The next prime is 20242551317. The reversal of 20242551289 is 98215524202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13288325625 + 6954225664 = 115275^2 + 83392^2 .

It is a cyclic number.

It is not a de Polignac number, because 20242551289 - 2⁵ = 20242551257 is a prime.

It is not a weakly prime, because it can be changed into another prime (20222551289) 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 as a sum of consecutive naturals, namely, 10121275644 + 10121275645.

It is an arithmetic number, because the mean of its divisors is an integer number (10121275645).

Almost surely, 2^20242551289 is an apocalyptic number.

It is an amenable number.

20242551289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20242551289 is an equidigital number, since it uses as much as digits as its factorization.

20242551289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 20242551289 in words is "twenty billion, two hundred forty-two million, five hundred fifty-one thousand, two hundred eighty-nine".