19690830 has 64 divisors (see below), whose sum is σ = 52902720. Its totient is φ = 5211648.

The previous prime is 19690823. The next prime is 19690841. The reversal of 19690830 is 3809691.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62754 + ... + 63066.

It is an arithmetic number, because the mean of its divisors is an integer number (826605).

Almost surely, 2^19690830 is an apocalyptic number.

19690830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19690830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26451360).

19690830 is an abundant number, since it is smaller than the sum of its proper divisors (33211890).

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

19690830 is a wasteful number, since it uses less digits than its factorization.

19690830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19690830 is about 4437.4350699475. The cubic root of 19690830 is about 270.0357977227.

The spelling of 19690830 in words is "nineteen million, six hundred ninety thousand, eight hundred thirty".