19424868 has 12 divisors (see below), whose sum is σ = 45324720. Its totient is φ = 6474952.

The previous prime is 19424851. The next prime is 19424869. The reversal of 19424868 is 86842491.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19424869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809358 + ... + 809381.

It is an arithmetic number, because the mean of its divisors is an integer number (3777060).

Almost surely, 2^19424868 is an apocalyptic number.

It is an amenable number.

19424868 is an abundant number, since it is smaller than the sum of its proper divisors (25899852).

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

19424868 is a wasteful number, since it uses less digits than its factorization.

19424868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618746 (or 1618744 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 19424868 is about 4407.3651992999. The cubic root of 19424868 is about 268.8145006173.

The spelling of 19424868 in words is "nineteen million, four hundred twenty-four thousand, eight hundred sixty-eight".