20131424 has 24 divisors (see below), whose sum is σ = 39736368. Its totient is φ = 10039680.

The previous prime is 20131399. The next prime is 20131427. The reversal of 20131424 is 42413102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131427) 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, 19694 + ... + 20690.

It is an arithmetic number, because the mean of its divisors is an integer number (1655682).

Almost surely, 2^20131424 is an apocalyptic number.

It is an amenable number.

20131424 is a deficient number, since it is larger than the sum of its proper divisors (19604944).

20131424 is an equidigital number, since it uses as much as digits as its factorization.

20131424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20131424 is about 4486.8055451512. The cubic root of 20131424 is about 272.0350300905.

Adding to 20131424 its reverse (42413102), we get a palindrome (62544526).

The spelling of 20131424 in words is "twenty million, one hundred thirty-one thousand, four hundred twenty-four".