19438436654 has 16 divisors (see below), whose sum is σ = 35886344928. Its totient is φ = 7689930912.

The previous prime is 19438436623. The next prime is 19438436713. The reversal of 19438436654 is 45663483491.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19438436596 and 19438436605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53402117 + ... + 53402480.

It is an arithmetic number, because the mean of its divisors is an integer number (2242896558).

Almost surely, 2^19438436654 is an apocalyptic number.

19438436654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19438436654 is a deficient number, since it is larger than the sum of its proper divisors (16447908274).

19438436654 is a wasteful number, since it uses less digits than its factorization.

19438436654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106804619.

The product of its digits is 7464960, while the sum is 53.

The spelling of 19438436654 in words is "nineteen billion, four hundred thirty-eight million, four hundred thirty-six thousand, six hundred fifty-four".