19442830 has 16 divisors (see below), whose sum is σ = 38178864. Its totient is φ = 7070080.

The previous prime is 19442809. The next prime is 19442831. The reversal of 19442830 is 3824491.

It is a junction number, because it is equal to n+sod(n) for n = 19442792 and 19442801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19442831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88267 + ... + 88486.

It is an arithmetic number, because the mean of its divisors is an integer number (2386179).

Almost surely, 2^19442830 is an apocalyptic number.

19442830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19442830 is a deficient number, since it is larger than the sum of its proper divisors (18736034).

19442830 is a wasteful number, since it uses less digits than its factorization.

19442830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176771.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 19442830 is about 4409.4024538479. The cubic root of 19442830 is about 268.8973318717.

It can be divided in two parts, 1944 and 2830, that added together give a palindrome (4774).

The spelling of 19442830 in words is "nineteen million, four hundred forty-two thousand, eight hundred thirty".