19418962505 has 32 divisors (see below), whose sum is σ = 24311536128. Its totient is φ = 14880153600.

The previous prime is 19418962499. The next prime is 19418962523. The reversal of 19418962505 is 50526981491.

It is not a de Polignac number, because 19418962505 - 2⁴ = 19418962489 is a prime.

It is a super-2 number, since 2×19418962505² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 2242985 + ... + 2251625.

It is an arithmetic number, because the mean of its divisors is an integer number (759735504).

Almost surely, 2^19418962505 is an apocalyptic number.

It is an amenable number.

19418962505 is a deficient number, since it is larger than the sum of its proper divisors (4892573623).

19418962505 is a wasteful number, since it uses less digits than its factorization.

19418962505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8897.

The product of its (nonzero) digits is 777600, while the sum is 50.

The spelling of 19418962505 in words is "nineteen billion, four hundred eighteen million, nine hundred sixty-two thousand, five hundred five".