20324072 has 16 divisors (see below), whose sum is σ = 40113600. Its totient is φ = 9627120.

The previous prime is 20324039. The next prime is 20324077. The reversal of 20324072 is 27042302.

It is a happy number.

It is a super-2 number, since 2×20324072² = 826135805322368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20324077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66704 + ... + 67007.

It is an arithmetic number, because the mean of its divisors is an integer number (2507100).

Almost surely, 2^20324072 is an apocalyptic number.

It is an amenable number.

20324072 is a deficient number, since it is larger than the sum of its proper divisors (19789528).

20324072 is a wasteful number, since it uses less digits than its factorization.

20324072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133736 (or 133732 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20324072 is about 4508.2227096717. Note that the first 3 decimals coincide. The cubic root of 20324072 is about 272.9000246662.

Adding to 20324072 its reverse (27042302), we get a palindrome (47366374).

The spelling of 20324072 in words is "twenty million, three hundred twenty-four thousand, seventy-two".