20004356356553 has 2 divisors, whose sum is σ = 20004356356554. Its totient is φ = 20004356356552.

The previous prime is 20004356356507. The next prime is 20004356356679. The reversal of 20004356356553 is 35565365340002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11849036871049 + 8155319485504 = 3442243^2 + 2855752^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004356356553 - 2⁶ = 20004356356489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20004356356498 and 20004356356507.

It is not a weakly prime, because it can be changed into another prime (20004356356253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002178178276 + 10002178178277.

It is an arithmetic number, because the mean of its divisors is an integer number (10002178178277).

Almost surely, 2^{20004356356553} is an apocalyptic number.

It is an amenable number.

20004356356553 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004356356553 is an equidigital number, since it uses as much as digits as its factorization.

20004356356553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860000, while the sum is 47.

The spelling of 20004356356553 in words is "twenty trillion, four billion, three hundred fifty-six million, three hundred fifty-six thousand, five hundred fifty-three".