20429703902117 has 2 divisors, whose sum is σ = 20429703902118. Its totient is φ = 20429703902116.

The previous prime is 20429703902081. The next prime is 20429703902149. The reversal of 20429703902117 is 71120930792402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18112735880836 + 2316968021281 = 4255906^2 + 1522159^2 .

It is a cyclic number.

It is not a de Polignac number, because 20429703902117 - 2¹⁴ = 20429703885733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20429703902197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10214851951058 + 10214851951059.

It is an arithmetic number, because the mean of its divisors is an integer number (10214851951059).

Almost surely, 2^{20429703902117} is an apocalyptic number.

It is an amenable number.

20429703902117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20429703902117 is an equidigital number, since it uses as much as digits as its factorization.

20429703902117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 20429703902117 in words is "twenty trillion, four hundred twenty-nine billion, seven hundred three million, nine hundred two thousand, one hundred seventeen".