19440968747 has 2 divisors, whose sum is σ = 19440968748. Its totient is φ = 19440968746.

The previous prime is 19440968633. The next prime is 19440968797. The reversal of 19440968747 is 74786904491.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19440968747 - 2²⁴ = 19424191531 is a prime.

It is not a weakly prime, because it can be changed into another prime (19440968797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9720484373 + 9720484374.

It is an arithmetic number, because the mean of its divisors is an integer number (9720484374).

Almost surely, 2^19440968747 is an apocalyptic number.

19440968747 is a deficient number, since it is larger than the sum of its proper divisors (1).

19440968747 is an equidigital number, since it uses as much as digits as its factorization.

19440968747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 19440968747 in words is "nineteen billion, four hundred forty million, nine hundred sixty-eight thousand, seven hundred forty-seven".