20430460 has 24 divisors (see below), whose sum is σ = 43041600. Its totient is φ = 8145984.

The previous prime is 20430439. The next prime is 20430467. The reversal of 20430460 is 6403402.

It is a super-3 number, since 3×20430460³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5517 + ... + 8443.

It is an arithmetic number, because the mean of its divisors is an integer number (1793400).

Almost surely, 2^20430460 is an apocalyptic number.

20430460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20430460 is an abundant number, since it is smaller than the sum of its proper divisors (22611140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20430460 is a wasteful number, since it uses less digits than its factorization.

20430460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285 (or 3283 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20430460 is about 4520.0066371633. The cubic root of 20430460 is about 273.3753686426.

Adding to 20430460 its reverse (6403402), we get a palindrome (26833862).

The spelling of 20430460 in words is "twenty million, four hundred thirty thousand, four hundred sixty".