20349424 has 10 divisors (see below), whose sum is σ = 39427040. Its totient is φ = 10174704.

The previous prime is 20349421. The next prime is 20349431. The reversal of 20349424 is 42494302.

It is a junction number, because it is equal to n+sod(n) for n = 20349392 and 20349401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20349421) 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 as a sum of consecutive naturals, namely, 635904 + ... + 635935.

It is an arithmetic number, because the mean of its divisors is an integer number (3942704).

Almost surely, 2^20349424 is an apocalyptic number.

It is an amenable number.

20349424 is a deficient number, since it is larger than the sum of its proper divisors (19077616).

20349424 is a wasteful number, since it uses less digits than its factorization.

20349424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271847 (or 1271841 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20349424 is about 4511.0335844460. The cubic root of 20349424 is about 273.0134482411.

The spelling of 20349424 in words is "twenty million, three hundred forty-nine thousand, four hundred twenty-four".