19988288991 has 36 divisors (see below), whose sum is σ = 31768507680. Its totient is φ = 12101443200.

The previous prime is 19988288977. The next prime is 19988289011.

19988288991 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 19988288991 - 2⁵ = 19988288959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19988288911) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1089706 + ... + 1107896.

Almost surely, 2^19988288991 is an apocalyptic number.

19988288991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19988288991 is a deficient number, since it is larger than the sum of its proper divisors (11780218689).

19988288991 is a wasteful number, since it uses less digits than its factorization.

19988288991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19228 (or 19214 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 72.

The spelling of 19988288991 in words is "nineteen billion, nine hundred eighty-eight million, two hundred eighty-eight thousand, nine hundred ninety-one".