20390740017169 has 4 divisors (see below), whose sum is σ = 20391665250880. Its totient is φ = 20389814783460.

The previous prime is 20390740017157. The next prime is 20390740017173. The reversal of 20390740017169 is 96171004709302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20390740017169 - 2⁹ = 20390740016657 is a prime.

It is a super-2 number, since 2×20390740017169² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20390740017269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462583797 + ... + 462627874.

It is an arithmetic number, because the mean of its divisors is an integer number (5097916312720).

Almost surely, 2^{20390740017169} is an apocalyptic number.

It is an amenable number.

20390740017169 is a deficient number, since it is larger than the sum of its proper divisors (925233711).

20390740017169 is an equidigital number, since it uses as much as digits as its factorization.

20390740017169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925233710.

The product of its (nonzero) digits is 571536, while the sum is 49.

The spelling of 20390740017169 in words is "twenty trillion, three hundred ninety billion, seven hundred forty million, seventeen thousand, one hundred sixty-nine".