20040404422189 has 2 divisors, whose sum is σ = 20040404422190. Its totient is φ = 20040404422188.

The previous prime is 20040404422183. The next prime is 20040404422229. The reversal of 20040404422189 is 98122440404002.

It is an a-pointer prime, because the next prime (20040404422229) can be obtained adding 20040404422189 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14204290624164 + 5836113798025 = 3768858^2 + 2415805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20040404422189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20040404422183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020202211094 + 10020202211095.

It is an arithmetic number, because the mean of its divisors is an integer number (10020202211095).

Almost surely, 2^{20040404422189} is an apocalyptic number.

It is an amenable number.

20040404422189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040404422189 is an equidigital number, since it uses as much as digits as its factorization.

20040404422189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 20040404422189 in words is "twenty trillion, forty billion, four hundred four million, four hundred twenty-two thousand, one hundred eighty-nine".