20154323326273 has 2 divisors, whose sum is σ = 20154323326274. Its totient is φ = 20154323326272.

The previous prime is 20154323326253. The next prime is 20154323326279. The reversal of 20154323326273 is 37262332345102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19298387498049 + 855935828224 = 4392993^2 + 925168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20154323326273 is a prime.

It is not a weakly prime, because it can be changed into another prime (20154323326279) 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 as a sum of consecutive naturals, namely, 10077161663136 + 10077161663137.

It is an arithmetic number, because the mean of its divisors is an integer number (10077161663137).

Almost surely, 2^{20154323326273} is an apocalyptic number.

It is an amenable number.

20154323326273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20154323326273 is an equidigital number, since it uses as much as digits as its factorization.

20154323326273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 43.

The spelling of 20154323326273 in words is "twenty trillion, one hundred fifty-four billion, three hundred twenty-three million, three hundred twenty-six thousand, two hundred seventy-three".