20131324 has 12 divisors (see below), whose sum is σ = 35368704. Its totient is φ = 10025984.

The previous prime is 20131313. The next prime is 20131339. The reversal of 20131324 is 42313102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20131298 and 20131307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8764 + ... + 10819.

It is an arithmetic number, because the mean of its divisors is an integer number (2947392).

Almost surely, 2^20131324 is an apocalyptic number.

It is an amenable number.

20131324 is a deficient number, since it is larger than the sum of its proper divisors (15237380).

20131324 is a wasteful number, since it uses less digits than its factorization.

20131324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19844 (or 19842 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20131324 is about 4486.7944013516. The cubic root of 20131324 is about 272.0345796579.

Adding to 20131324 its reverse (42313102), we get a palindrome (62444426).

The spelling of 20131324 in words is "twenty million, one hundred thirty-one thousand, three hundred twenty-four".