20196424 has 8 divisors (see below), whose sum is σ = 37868310. Its totient is φ = 10098208.

The previous prime is 20196409. The next prime is 20196427. The reversal of 20196424 is 42469102.

It can be written as a sum of positive squares in only one way, i.e., 10771524 + 9424900 = 3282^2 + 3070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20196392 and 20196401.

It is not an unprimeable number, because it can be changed into a prime (20196427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262269 + ... + 1262284.

Almost surely, 2^20196424 is an apocalyptic number.

It is an amenable number.

20196424 is a deficient number, since it is larger than the sum of its proper divisors (17671886).

20196424 is a wasteful number, since it uses less digits than its factorization.

20196424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524559 (or 2524555 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20196424 is about 4494.0431684620. The cubic root of 20196424 is about 272.3274962415.

The spelling of 20196424 in words is "twenty million, one hundred ninety-six thousand, four hundred twenty-four".