20390043167999 has 4 divisors (see below), whose sum is σ = 20396441051064. Its totient is φ = 20383645284936.

The previous prime is 20390043167957. The next prime is 20390043168013. The reversal of 20390043167999 is 99976134009302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20390043167999 is a prime.

It is a super-2 number, since 2×20390043167999² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20390043167899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3198936752 + ... + 3198943125.

It is an arithmetic number, because the mean of its divisors is an integer number (5099110262766).

Almost surely, 2^{20390043167999} is an apocalyptic number.

20390043167999 is a deficient number, since it is larger than the sum of its proper divisors (6397883065).

20390043167999 is an equidigital number, since it uses as much as digits as its factorization.

20390043167999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6397883064.

The product of its (nonzero) digits is 19840464, while the sum is 62.

The spelling of 20390043167999 in words is "twenty trillion, three hundred ninety billion, forty-three million, one hundred sixty-seven thousand, nine hundred ninety-nine".