18966952801 has 2 divisors, whose sum is σ = 18966952802. Its totient is φ = 18966952800.

The previous prime is 18966952793. The next prime is 18966952867. The reversal of 18966952801 is 10825966981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17862055201 + 1104897600 = 133649^2 + 33240^2 .

It is a cyclic number.

It is not a de Polignac number, because 18966952801 - 2³ = 18966952793 is a prime.

It is not a weakly prime, because it can be changed into another prime (18966952871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9483476400 + 9483476401.

It is an arithmetic number, because the mean of its divisors is an integer number (9483476401).

Almost surely, 2^18966952801 is an apocalyptic number.

It is an amenable number.

18966952801 is a deficient number, since it is larger than the sum of its proper divisors (1).

18966952801 is an equidigital number, since it uses as much as digits as its factorization.

18966952801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 18966952801 in words is "eighteen billion, nine hundred sixty-six million, nine hundred fifty-two thousand, eight hundred one".