20454330 has 64 divisors (see below), whose sum is σ = 53343360. Its totient is φ = 4989696.

The previous prime is 20454311. The next prime is 20454331. The reversal of 20454330 is 3345402.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20454297 and 20454306.

It is not an unprimeable number, because it can be changed into a prime (20454331) 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 31 ways as a sum of consecutive naturals, for example, 69664 + ... + 69956.

It is an arithmetic number, because the mean of its divisors is an integer number (833490).

Almost surely, 2^20454330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20454330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26671680).

20454330 is an abundant number, since it is smaller than the sum of its proper divisors (32889030).

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

20454330 is a wasteful number, since it uses less digits than its factorization.

20454330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20454330 is about 4522.6463492075. The cubic root of 20454330 is about 273.4817935647.

Adding to 20454330 its reverse (3345402), we get a palindrome (23799732).

The spelling of 20454330 in words is "twenty million, four hundred fifty-four thousand, three hundred thirty".