20404563200869 has 2 divisors, whose sum is σ = 20404563200870. Its totient is φ = 20404563200868.

The previous prime is 20404563200807. The next prime is 20404563200873. The reversal of 20404563200869 is 96800236540402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19315541553025 + 1089021647844 = 4394945^2 + 1043562^2 .

It is a cyclic number.

It is not a de Polignac number, because 20404563200869 - 2⁴³ = 11608470178661 is a prime.

It is a super-2 number, since 2×20404563200869² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20404563200569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202281600434 + 10202281600435.

It is an arithmetic number, because the mean of its divisors is an integer number (10202281600435).

Almost surely, 2^{20404563200869} is an apocalyptic number.

It is an amenable number.

20404563200869 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404563200869 is an equidigital number, since it uses as much as digits as its factorization.

20404563200869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 20404563200869 in words is "twenty trillion, four hundred four billion, five hundred sixty-three million, two hundred thousand, eight hundred sixty-nine".