19438218486 has 40 divisors (see below), whose sum is σ = 44961052224. Its totient is φ = 6270391440.

The previous prime is 19438218463. The next prime is 19438218493. The reversal of 19438218486 is 68481283491.

It is a happy number.

19438218486 is a `hidden beast` number, since 1 + 9 + 4 + 382 + 184 + 86 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1930285 + ... + 1940328.

Almost surely, 2^19438218486 is an apocalyptic number.

19438218486 is an abundant number, since it is smaller than the sum of its proper divisors (25522833738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19438218486 is a wasteful number, since it uses less digits than its factorization.

19438218486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870658 (or 3870649 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 19438218486 in words is "nineteen billion, four hundred thirty-eight million, two hundred eighteen thousand, four hundred eighty-six".