20304434 has 8 divisors (see below), whose sum is σ = 30758508. Its totient is φ = 10051600.

The previous prime is 20304433. The next prime is 20304457. The reversal of 20304434 is 43440302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20295025 + 9409 = 4505^2 + 97^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20304433) 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, 50057 + ... + 50460.

Almost surely, 2^20304434 is an apocalyptic number.

20304434 is a deficient number, since it is larger than the sum of its proper divisors (10454074).

20304434 is a wasteful number, since it uses less digits than its factorization.

20304434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100620.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 20304434 is about 4506.0441631214. The cubic root of 20304434 is about 272.8121003941.

Adding to 20304434 its reverse (43440302), we get a palindrome (63744736).

The spelling of 20304434 in words is "twenty million, three hundred four thousand, four hundred thirty-four".