19338542505 has 16 divisors (see below), whose sum is σ = 34379631360. Its totient is φ = 10313889264.

The previous prime is 19338542477. The next prime is 19338542527. The reversal of 19338542505 is 50524583391.

19338542505 is a `hidden beast` number, since 1 + 93 + 3 + 8 + 54 + 2 + 505 = 666.

It is not a de Polignac number, because 19338542505 - 2⁶ = 19338542441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71624097 + ... + 71624366.

It is an arithmetic number, because the mean of its divisors is an integer number (2148726960).

Almost surely, 2^19338542505 is an apocalyptic number.

19338542505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19338542505 is a deficient number, since it is larger than the sum of its proper divisors (15041088855).

19338542505 is a wasteful number, since it uses less digits than its factorization.

19338542505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143248477 (or 143248471 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 19338542505 in words is "nineteen billion, three hundred thirty-eight million, five hundred forty-two thousand, five hundred five".