19408743945 has 24 divisors (see below), whose sum is σ = 33700784832. Its totient is φ = 10333188000.

The previous prime is 19408743929. The next prime is 19408743967. The reversal of 19408743945 is 54934780491.

19408743945 is a `hidden beast` number, since 1 + 94 + 0 + 87 + 439 + 45 = 666.

It is not a de Polignac number, because 19408743945 - 2⁴ = 19408743929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19408743891 and 19408743900.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351981 + ... + 403370.

It is an arithmetic number, because the mean of its divisors is an integer number (1404199368).

Almost surely, 2^19408743945 is an apocalyptic number.

19408743945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19408743945 is a deficient number, since it is larger than the sum of its proper divisors (14292040887).

19408743945 is a wasteful number, since it uses less digits than its factorization.

19408743945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755933 (or 755930 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 19408743945 in words is "nineteen billion, four hundred eight million, seven hundred forty-three thousand, nine hundred forty-five".