20432330 has 16 divisors (see below), whose sum is σ = 36839880. Its totient is φ = 8159232.

The previous prime is 20432329. The next prime is 20432333. The reversal of 20432330 is 3323402.

It can be written as a sum of positive squares in 4 ways, for example, as 16703569 + 3728761 = 4087^2 + 1931^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20432299 and 20432308.

It is not an unprimeable number, because it can be changed into a prime (20432333) 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, 6362 + ... + 9018.

Almost surely, 2^20432330 is an apocalyptic number.

20432330 is a deficient number, since it is larger than the sum of its proper divisors (16407550).

20432330 is a wasteful number, since it uses less digits than its factorization.

20432330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433.

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 20432330 is about 4520.2134905334. The cubic root of 20432330 is about 273.3837090706.

Adding to 20432330 its reverse (3323402), we get a palindrome (23755732).

The spelling of 20432330 in words is "twenty million, four hundred thirty-two thousand, three hundred thirty".