19408738755 has 32 divisors (see below), whose sum is σ = 37577931264. Its totient is φ = 8350649856.

The previous prime is 19408738733. The next prime is 19408738799. The reversal of 19408738755 is 55783780491.

It is a happy number.

It is not a de Polignac number, because 19408738755 - 2¹⁹ = 19408214467 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19408738695 and 19408738704.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 5434837 + ... + 5438406.

It is an arithmetic number, because the mean of its divisors is an integer number (1174310352).

Almost surely, 2^19408738755 is an apocalyptic number.

19408738755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19408738755 is a deficient number, since it is larger than the sum of its proper divisors (18169192509).

19408738755 is a wasteful number, since it uses less digits than its factorization.

19408738755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10873275.

The product of its (nonzero) digits is 8467200, while the sum is 57.

The spelling of 19408738755 in words is "nineteen billion, four hundred eight million, seven hundred thirty-eight thousand, seven hundred fifty-five".