20316432 has 20 divisors (see below), whose sum is σ = 52484240. Its totient is φ = 6772128.

The previous prime is 20316427. The next prime is 20316433. The reversal of 20316432 is 23461302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20316399 and 20316408.

It is not an unprimeable number, because it can be changed into a prime (20316433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211582 + ... + 211677.

It is an arithmetic number, because the mean of its divisors is an integer number (2624212).

Almost surely, 2^20316432 is an apocalyptic number.

It is an amenable number.

20316432 is an abundant number, since it is smaller than the sum of its proper divisors (32167808).

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

20316432 is a wasteful number, since it uses less digits than its factorization.

20316432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423270 (or 423264 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20316432 is about 4507.3752894562. The cubic root of 20316432 is about 272.8658251958.

Adding to 20316432 its reverse (23461302), we get a palindrome (43777734).

The spelling of 20316432 in words is "twenty million, three hundred sixteen thousand, four hundred thirty-two".