20424243034109 has 2 divisors, whose sum is σ = 20424243034110. Its totient is φ = 20424243034108.

The previous prime is 20424243034103. The next prime is 20424243034141. The reversal of 20424243034109 is 90143034242402.

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., 13042137732100 + 7382105302009 = 3611390^2 + 2717003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20424243034109 is a prime.

It is a super-3 number, since 3×20424243034109³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424243034103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212121517054 + 10212121517055.

It is an arithmetic number, because the mean of its divisors is an integer number (10212121517055).

Almost surely, 2^{20424243034109} is an apocalyptic number.

It is an amenable number.

20424243034109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424243034109 is an equidigital number, since it uses as much as digits as its factorization.

20424243034109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 20424243034109 in words is "twenty trillion, four hundred twenty-four billion, two hundred forty-three million, thirty-four thousand, one hundred nine".