19690424 has 32 divisors (see below), whose sum is σ = 40446000. Its totient is φ = 8931072.

The previous prime is 19690421. The next prime is 19690457. The reversal of 19690424 is 42409691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19690421) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4532 + ... + 7740.

Almost surely, 2^19690424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19690424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20223000).

19690424 is an abundant number, since it is smaller than the sum of its proper divisors (20755576).

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

19690424 is a wasteful number, since it uses less digits than its factorization.

19690424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287 (or 3283 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 19690424 is about 4437.3893225634. The cubic root of 19690424 is about 270.0339417778.

The spelling of 19690424 in words is "nineteen million, six hundred ninety thousand, four hundred twenty-four".