19740671982 has 24 divisors (see below), whose sum is σ = 42948940320. Its totient is φ = 6552918720.

The previous prime is 19740671969. The next prime is 19740671987. The reversal of 19740671982 is 28917604791.

19740671982 is a `hidden beast` number, since 1 + 97 + 406 + 71 + 9 + 82 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19740671987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2270982 + ... + 2279657.

It is an arithmetic number, because the mean of its divisors is an integer number (1789539180).

Almost surely, 2^19740671982 is an apocalyptic number.

19740671982 is an abundant number, since it is smaller than the sum of its proper divisors (23208268338).

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

19740671982 is a wasteful number, since it uses less digits than its factorization.

19740671982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550888 (or 4550885 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 19740671982 in words is "nineteen billion, seven hundred forty million, six hundred seventy-one thousand, nine hundred eighty-two".