19888342 has 4 divisors (see below), whose sum is σ = 29832516. Its totient is φ = 9944170.

The previous prime is 19888331. The next prime is 19888343. The reversal of 19888342 is 24388891.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×19888342² = 791092295017928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19888343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972084 + ... + 4972087.

It is an arithmetic number, because the mean of its divisors is an integer number (7458129).

Almost surely, 2^19888342 is an apocalyptic number.

19888342 is a deficient number, since it is larger than the sum of its proper divisors (9944174).

19888342 is an equidigital number, since it uses as much as digits as its factorization.

19888342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9944173.

The product of its digits is 110592, while the sum is 43.

The square root of 19888342 is about 4459.6347384063. The cubic root of 19888342 is about 270.9356746062.

The spelling of 19888342 in words is "nineteen million, eight hundred eighty-eight thousand, three hundred forty-two".