19483438491 has 128 divisors (see below), whose sum is σ = 33092167680. Its totient is φ = 11227507200.

The previous prime is 19483438459. The next prime is 19483438493.

19483438491 is a `hidden beast` number, since 1 + 94 + 8 + 34 + 38 + 491 = 666.

19483438491 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 19483438491 - 2⁵ = 19483438459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19483438493) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 98900605 + ... + 98900801.

It is an arithmetic number, because the mean of its divisors is an integer number (258532560).

Almost surely, 2^19483438491 is an apocalyptic number.

19483438491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19483438491 is a deficient number, since it is larger than the sum of its proper divisors (13608729189).

19483438491 is a wasteful number, since it uses less digits than its factorization.

19483438491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 428 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The spelling of 19483438491 in words is "nineteen billion, four hundred eighty-three million, four hundred thirty-eight thousand, four hundred ninety-one".