20430329 has 4 divisors (see below), whose sum is σ = 20485476. Its totient is φ = 20375184.

The previous prime is 20430323. The next prime is 20430349. The reversal of 20430329 is 92303402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16321600 + 4108729 = 4040^2 + 2027^2 .

It is a cyclic number.

It is not a de Polignac number, because 20430329 - 2¹² = 20426233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27014 + ... + 27759.

It is an arithmetic number, because the mean of its divisors is an integer number (5121369).

Almost surely, 2^20430329 is an apocalyptic number.

It is an amenable number.

20430329 is a deficient number, since it is larger than the sum of its proper divisors (55147).

20430329 is an equidigital number, since it uses as much as digits as its factorization.

20430329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55146.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20430329 is about 4519.9921460109. The cubic root of 20430329 is about 273.3747843475.

The spelling of 20430329 in words is "twenty million, four hundred thirty thousand, three hundred twenty-nine".