19440969133 has 2 divisors, whose sum is σ = 19440969134. Its totient is φ = 19440969132.

The previous prime is 19440969101. The next prime is 19440969137. The reversal of 19440969133 is 33196904491.

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., 12624320164 + 6816648969 = 112358^2 + 82563^2 .

It is a cyclic number.

It is not a de Polignac number, because 19440969133 - 2⁵ = 19440969101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19440969137) 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, 9720484566 + 9720484567.

It is an arithmetic number, because the mean of its divisors is an integer number (9720484567).

Almost surely, 2^19440969133 is an apocalyptic number.

It is an amenable number.

19440969133 is a deficient number, since it is larger than the sum of its proper divisors (1).

19440969133 is an equidigital number, since it uses as much as digits as its factorization.

19440969133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 49.

The spelling of 19440969133 in words is "nineteen billion, four hundred forty million, nine hundred sixty-nine thousand, one hundred thirty-three".