19838868 has 48 divisors (see below), whose sum is σ = 53813760. Its totient is φ = 5570784.

The previous prime is 19838851. The next prime is 19838873. The reversal of 19838868 is 86883891.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19838868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2955 + ... + 6957.

It is an arithmetic number, because the mean of its divisors is an integer number (1121120).

Almost surely, 2^19838868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19838868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26906880).

19838868 is an abundant number, since it is smaller than the sum of its proper divisors (33974892).

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

19838868 is a wasteful number, since it uses less digits than its factorization.

19838868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4076 (or 4074 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 19838868 is about 4454.0844177002. The cubic root of 19838868 is about 270.7108292887.

It can be divided in two parts, 19838 and 868, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 19838868 in words is "nineteen million, eight hundred thirty-eight thousand, eight hundred sixty-eight".