19981068 has 24 divisors (see below), whose sum is σ = 47707968. Its totient is φ = 6505296.

The previous prime is 19981061. The next prime is 19981079. The reversal of 19981068 is 86018991.

It is not an unprimeable number, because it can be changed into a prime (19981061) 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, 18846 + ... + 19877.

It is an arithmetic number, because the mean of its divisors is an integer number (1987832).

Almost surely, 2^19981068 is an apocalyptic number.

It is an amenable number.

19981068 is an abundant number, since it is smaller than the sum of its proper divisors (27726900).

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

19981068 is a wasteful number, since it uses less digits than its factorization.

19981068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38773 (or 38771 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 19981068 is about 4470.0187919068. The cubic root of 19981068 is about 271.3560856963.

The spelling of 19981068 in words is "nineteen million, nine hundred eighty-one thousand, sixty-eight".