19138297488 has 40 divisors (see below), whose sum is σ = 49755529728. Its totient is φ = 6338796672.

The previous prime is 19138297487. The next prime is 19138297501. The reversal of 19138297488 is 88479283191.

It is a super-2 number, since 2×19138297488² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19138297487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262256 + ... + 1277327.

Almost surely, 2^19138297488 is an apocalyptic number.

It is an amenable number.

19138297488 is an abundant number, since it is smaller than the sum of its proper divisors (30617232240).

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

19138297488 is a wasteful number, since it uses less digits than its factorization.

19138297488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539751 (or 2539745 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 60.

The spelling of 19138297488 in words is "nineteen billion, one hundred thirty-eight million, two hundred ninety-seven thousand, four hundred eighty-eight".