19440929413 has 2 divisors, whose sum is σ = 19440929414. Its totient is φ = 19440929412.

The previous prime is 19440929393. The next prime is 19440929419. The reversal of 19440929413 is 31492904491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18944219044 + 496710369 = 137638^2 + 22287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19440929413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19440929419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9720464706 + 9720464707.

It is an arithmetic number, because the mean of its divisors is an integer number (9720464707).

Almost surely, 2^19440929413 is an apocalyptic number.

It is an amenable number.

19440929413 is a deficient number, since it is larger than the sum of its proper divisors (1).

19440929413 is an equidigital number, since it uses as much as digits as its factorization.

19440929413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 19440929413 in words is "nineteen billion, four hundred forty million, nine hundred twenty-nine thousand, four hundred thirteen".