19149478848 has 42 divisors (see below), whose sum is σ = 54888525224. Its totient is φ = 6383159424.

The previous prime is 19149478823. The next prime is 19149478867. The reversal of 19149478848 is 84887494191.

19149478848 is a `hidden beast` number, since 19 + 149 + 478 + 8 + 4 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16622236 + ... + 16623387.

Almost surely, 2^19149478848 is an apocalyptic number.

19149478848 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19149478848 is an abundant number, since it is smaller than the sum of its proper divisors (35739046376).

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

19149478848 is a wasteful number, since it uses less digits than its factorization.

19149478848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33245641 (or 33245628 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 63.

The spelling of 19149478848 in words is "nineteen billion, one hundred forty-nine million, four hundred seventy-eight thousand, eight hundred forty-eight".