20311324 has 24 divisors (see below), whose sum is σ = 40029696. Its totient is φ = 8934000.

The previous prime is 20311321. The next prime is 20311331. The reversal of 20311324 is 42311302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20311298 and 20311307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6082 + ... + 8809.

It is an arithmetic number, because the mean of its divisors is an integer number (1667904).

Almost surely, 2^20311324 is an apocalyptic number.

It is an amenable number.

20311324 is a deficient number, since it is larger than the sum of its proper divisors (19718372).

20311324 is a wasteful number, since it uses less digits than its factorization.

20311324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14937 (or 14935 counting only the distinct ones).

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

The square root of 20311324 is about 4506.8086269554. The cubic root of 20311324 is about 272.8429551128.

Adding to 20311324 its reverse (42311302), we get a palindrome (62622626).

The spelling of 20311324 in words is "twenty million, three hundred eleven thousand, three hundred twenty-four".