19219842 has 48 divisors (see below), whose sum is σ = 43872192. Its totient is φ = 6305040.

The previous prime is 19219829. The next prime is 19219853. The reversal of 19219842 is 24891291.

It is a junction number, because it is equal to n+sod(n) for n = 19219797 and 19219806.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34228 + ... + 34784.

It is an arithmetic number, because the mean of its divisors is an integer number (914004).

Almost surely, 2^19219842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19219842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21936096).

19219842 is an abundant number, since it is smaller than the sum of its proper divisors (24652350).

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

19219842 is an equidigital number, since it uses as much as digits as its factorization.

19219842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 633 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 19219842 is about 4384.0440235016. The cubic root of 19219842 is about 267.8653905575.

The spelling of 19219842 in words is "nineteen million, two hundred nineteen thousand, eight hundred forty-two".