19782168 has 32 divisors (see below), whose sum is σ = 56520960. Its totient is φ = 5652000.

The previous prime is 19782143. The next prime is 19782199. The reversal of 19782168 is 86128791.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58708 + ... + 59043.

It is an arithmetic number, because the mean of its divisors is an integer number (1766280).

Almost surely, 2^19782168 is an apocalyptic number.

It is an amenable number.

19782168 is an abundant number, since it is smaller than the sum of its proper divisors (36738792).

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

19782168 is a wasteful number, since it uses less digits than its factorization.

19782168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117767 (or 117763 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The square root of 19782168 is about 4447.7149189219. The cubic root of 19782168 is about 270.4526836763.

The spelling of 19782168 in words is "nineteen million, seven hundred eighty-two thousand, one hundred sixty-eight".