19782012 has 24 divisors (see below), whose sum is σ = 46230912. Its totient is φ = 6583600.

The previous prime is 19782011. The next prime is 19782017. The reversal of 19782012 is 21028791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19782011) 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, 12337 + ... + 13847.

It is an arithmetic number, because the mean of its divisors is an integer number (1926288).

Almost surely, 2^19782012 is an apocalyptic number.

19782012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19782012 is an abundant number, since it is smaller than the sum of its proper divisors (26448900).

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

19782012 is a wasteful number, since it uses less digits than its factorization.

19782012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609 (or 2607 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 19782012 is about 4447.6973817921. The cubic root of 19782012 is about 270.4519727544.

The spelling of 19782012 in words is "nineteen million, seven hundred eighty-two thousand, twelve".