19408374297 has 24 divisors (see below), whose sum is σ = 30230615688. Its totient is φ = 11927865600.

The previous prime is 19408374289. The next prime is 19408374317. The reversal of 19408374297 is 79247380491.

It can be written as a sum of positive squares in 4 ways, for example, as 4464778761 + 14943595536 = 66819^2 + 122244^2 .

It is not a de Polignac number, because 19408374297 - 2³ = 19408374289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19408374397) 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 in 23 ways as a sum of consecutive naturals, for example, 19954 + ... + 198027.

It is an arithmetic number, because the mean of its divisors is an integer number (1259608987).

Almost surely, 2^19408374297 is an apocalyptic number.

It is an amenable number.

19408374297 is a deficient number, since it is larger than the sum of its proper divisors (10822241391).

19408374297 is a wasteful number, since it uses less digits than its factorization.

19408374297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218761 (or 218758 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 19408374297 in words is "nineteen billion, four hundred eight million, three hundred seventy-four thousand, two hundred ninety-seven".