20320424 has 32 divisors (see below), whose sum is σ = 41052000. Its totient is φ = 9398592.

The previous prime is 20320409. The next prime is 20320427. The reversal of 20320424 is 42402302.

20320424 = 627² + 628² + ... + 674².

It is not an unprimeable number, because it can be changed into a prime (20320427) 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, 4982 + ... + 8090.

It is an arithmetic number, because the mean of its divisors is an integer number (1282875).

Almost surely, 2^20320424 is an apocalyptic number.

It is an amenable number.

20320424 is an abundant number, since it is smaller than the sum of its proper divisors (20731576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20320424 is a wasteful number, since it uses less digits than its factorization.

20320424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177 (or 3173 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20320424 is about 4507.8180974835. The cubic root of 20320424 is about 272.8836959361.

Adding to 20320424 its reverse (42402302), we get a palindrome (62722726).

The spelling of 20320424 in words is "twenty million, three hundred twenty thousand, four hundred twenty-four".