20454400 has 132 divisors (see below), whose sum is σ = 54826848. Its totient is φ = 7536640.

The previous prime is 20454361. The next prime is 20454403. The reversal of 20454400 is 445402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 435177 + ... + 435223.

Almost surely, 2^20454400 is an apocalyptic number.

20454400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20454400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27413424).

20454400 is an abundant number, since it is smaller than the sum of its proper divisors (34372448).

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

20454400 is a wasteful number, since it uses less digits than its factorization.

20454400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 20454400 is about 4522.6540880328. The cubic root of 20454400 is about 273.4821055395.

Adding to 20454400 its reverse (445402), we get a palindrome (20899802).

The spelling of 20454400 in words is "twenty million, four hundred fifty-four thousand, four hundred".