19850424 has 64 divisors (see below), whose sum is σ = 57335040. Its totient is φ = 5660160.

The previous prime is 19850419. The next prime is 19850443. The reversal of 19850424 is 42405891.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 15 ways as a sum of consecutive naturals, for example, 2277 + ... + 6699.

It is an arithmetic number, because the mean of its divisors is an integer number (895860).

Almost surely, 2^19850424 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 19850424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28667520).

19850424 is an abundant number, since it is smaller than the sum of its proper divisors (37484616).

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

19850424 is a wasteful number, since it uses less digits than its factorization.

19850424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460 (or 4456 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 19850424 is about 4455.3814651498. The cubic root of 19850424 is about 270.7633814660.

The spelling of 19850424 in words is "nineteen million, eight hundred fifty thousand, four hundred twenty-four".