20434450 has 12 divisors (see below), whose sum is σ = 38008170. Its totient is φ = 8173760.

The previous prime is 20434411. The next prime is 20434457. The reversal of 20434450 is 5443402.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 9878449 + 10556001 = 3143^2 + 3249^2 .

It is not an unprimeable number, because it can be changed into a prime (20434457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204295 + ... + 204394.

Almost surely, 2^20434450 is an apocalyptic number.

20434450 is a deficient number, since it is larger than the sum of its proper divisors (17573720).

20434450 is a wasteful number, since it uses less digits than its factorization.

20434450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408701 (or 408696 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 20434450 is about 4520.4479866491. The cubic root of 20434450 is about 273.3931639136.

Adding to 20434450 its reverse (5443402), we get a palindrome (25877852).

The spelling of 20434450 in words is "twenty million, four hundred thirty-four thousand, four hundred fifty".