19877662989 has 12 divisors (see below), whose sum is σ = 28713412000. Its totient is φ = 13251206664.

The previous prime is 19877662951. The next prime is 19877662993. The reversal of 19877662989 is 98926677891.

It is not a de Polignac number, because 19877662989 - 2¹⁵ = 19877630221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19877662289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344952 + ... + 398430.

Almost surely, 2^19877662989 is an apocalyptic number.

It is an amenable number.

19877662989 is a deficient number, since it is larger than the sum of its proper divisors (8835749011).

19877662989 is a wasteful number, since it uses less digits than its factorization.

19877662989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94784 (or 94781 counting only the distinct ones).

The product of its digits is 164602368, while the sum is 72.

The spelling of 19877662989 in words is "nineteen billion, eight hundred seventy-seven million, six hundred sixty-two thousand, nine hundred eighty-nine".