19399242 has 16 divisors (see below), whose sum is σ = 40050432. Its totient is φ = 6257760.

The previous prime is 19399223. The next prime is 19399243. The reversal of 19399242 is 24299391.

It is a self number, because there is not a number n which added to its sum of digits gives 19399242.

It is not an unprimeable number, because it can be changed into a prime (19399243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51963 + ... + 52334.

It is an arithmetic number, because the mean of its divisors is an integer number (2503152).

Almost surely, 2^19399242 is an apocalyptic number.

19399242 is an abundant number, since it is smaller than the sum of its proper divisors (20651190).

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

19399242 is a wasteful number, since it uses less digits than its factorization.

19399242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104333.

The product of its digits is 34992, while the sum is 39.

The square root of 19399242 is about 4404.4570607511. The cubic root of 19399242 is about 268.6962386062.

The spelling of 19399242 in words is "nineteen million, three hundred ninety-nine thousand, two hundred forty-two".