18954223201 has 2 divisors, whose sum is σ = 18954223202. Its totient is φ = 18954223200.

The previous prime is 18954223199. The next prime is 18954223259. The reversal of 18954223201 is 10232245981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13735605601 + 5218617600 = 117199^2 + 72240^2 .

It is a cyclic number.

It is not a de Polignac number, because 18954223201 - 2¹ = 18954223199 is a prime.

Together with 18954223199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18954223271) 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, 9477111600 + 9477111601.

It is an arithmetic number, because the mean of its divisors is an integer number (9477111601).

Almost surely, 2^18954223201 is an apocalyptic number.

It is an amenable number.

18954223201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18954223201 is an equidigital number, since it uses as much as digits as its factorization.

18954223201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 18954223201 in words is "eighteen billion, nine hundred fifty-four million, two hundred twenty-three thousand, two hundred one".