19982886777 has 72 divisors (see below), whose sum is σ = 35757648576. Its totient is φ = 10524987072.

The previous prime is 19982886767. The next prime is 19982886817. The reversal of 19982886777 is 77768828991.

It is not a de Polignac number, because 19982886777 - 2¹⁵ = 19982854009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19982886767) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 829618 + ... + 853364.

It is an arithmetic number, because the mean of its divisors is an integer number (496634008).

Almost surely, 2^19982886777 is an apocalyptic number.

It is an amenable number.

19982886777 is a deficient number, since it is larger than the sum of its proper divisors (15774761799).

19982886777 is a wasteful number, since it uses less digits than its factorization.

19982886777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23835 (or 23813 counting only the distinct ones).

The product of its digits is 170698752, while the sum is 72.

The spelling of 19982886777 in words is "nineteen billion, nine hundred eighty-two million, eight hundred eighty-six thousand, seven hundred seventy-seven".