20030456 has 16 divisors (see below), whose sum is σ = 37829400. Its totient is φ = 9942624.

The previous prime is 20030453. The next prime is 20030467. The reversal of 20030456 is 65403002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030453) 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 3 ways as a sum of consecutive naturals, for example, 7895 + ... + 10118.

Almost surely, 2^20030456 is an apocalyptic number.

It is an amenable number.

20030456 is a deficient number, since it is larger than the sum of its proper divisors (17798944).

20030456 is a wasteful number, since it uses less digits than its factorization.

20030456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18158 (or 18154 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20030456 is about 4475.5397439862. The cubic root of 20030456 is about 271.5794756177.

Adding to 20030456 its reverse (65403002), we get a palindrome (85433458).

The spelling of 20030456 in words is "twenty million, thirty thousand, four hundred fifty-six".