20018355029 has 2 divisors, whose sum is σ = 20018355030. Its totient is φ = 20018355028.

The previous prime is 20018354899. The next prime is 20018355037. The reversal of 20018355029 is 92055381002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19356322129 + 662032900 = 139127^2 + 25730^2 .

It is a cyclic number.

It is not a de Polignac number, because 20018355029 - 2¹⁶ = 20018289493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20018355029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20018355079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009177514 + 10009177515.

It is an arithmetic number, because the mean of its divisors is an integer number (10009177515).

Almost surely, 2^20018355029 is an apocalyptic number.

It is an amenable number.

20018355029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20018355029 is an equidigital number, since it uses as much as digits as its factorization.

20018355029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 20018355029 in words is "twenty billion, eighteen million, three hundred fifty-five thousand, twenty-nine".