20019424 has 24 divisors (see below), whose sum is σ = 40332600. Its totient is φ = 9776256.

The previous prime is 20019403. The next prime is 20019427. The reversal of 20019424 is 42491002.

It is a junction number, because it is equal to n+sod(n) for n = 20019395 and 20019404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019427) 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 3 ways as a sum of consecutive naturals, for example, 5899 + ... + 8650.

It is an arithmetic number, because the mean of its divisors is an integer number (1680525).

Almost surely, 2^20019424 is an apocalyptic number.

It is an amenable number.

20019424 is an abundant number, since it is smaller than the sum of its proper divisors (20313176).

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

20019424 is a wasteful number, since it uses less digits than its factorization.

20019424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14602 (or 14594 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20019424 is about 4474.3070971939. The cubic root of 20019424 is about 271.5296079732.

The spelling of 20019424 in words is "twenty million, nineteen thousand, four hundred twenty-four".