20435107978799 has 2 divisors, whose sum is σ = 20435107978800. Its totient is φ = 20435107978798.

The previous prime is 20435107978793. The next prime is 20435107978801. The reversal of 20435107978799 is 99787970153402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20435107978799 - 2¹⁶ = 20435107913263 is a prime.

Together with 20435107978801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20435107978793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217553989399 + 10217553989400.

It is an arithmetic number, because the mean of its divisors is an integer number (10217553989400).

Almost surely, 2^{20435107978799} is an apocalyptic number.

20435107978799 is a deficient number, since it is larger than the sum of its proper divisors (1).

20435107978799 is an equidigital number, since it uses as much as digits as its factorization.

20435107978799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240045120, while the sum is 71.

The spelling of 20435107978799 in words is "twenty trillion, four hundred thirty-five billion, one hundred seven million, nine hundred seventy-eight thousand, seven hundred ninety-nine".