19454806739 has 2 divisors, whose sum is σ = 19454806740. Its totient is φ = 19454806738.

The previous prime is 19454806727. The next prime is 19454806753. The reversal of 19454806739 is 93760845491.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19454806739 is a prime.

It is not a weakly prime, because it can be changed into another prime (19454806939) 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, 9727403369 + 9727403370.

It is an arithmetic number, because the mean of its divisors is an integer number (9727403370).

Almost surely, 2^19454806739 is an apocalyptic number.

19454806739 is a deficient number, since it is larger than the sum of its proper divisors (1).

19454806739 is an equidigital number, since it uses as much as digits as its factorization.

19454806739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 19454806739 in words is "nineteen billion, four hundred fifty-four million, eight hundred six thousand, seven hundred thirty-nine".