20554200 has 144 divisors (see below), whose sum is σ = 72781800. Its totient is φ = 5184000.

The previous prime is 20554189. The next prime is 20554201. The reversal of 20554200 is 245502.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33900 + ... + 34500.

Almost surely, 2^20554200 is an apocalyptic number.

20554200 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 20554200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36390900).

20554200 is an abundant number, since it is smaller than the sum of its proper divisors (52227600).

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

20554200 is a wasteful number, since it uses less digits than its factorization.

20554200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 20554200 is about 4533.6740068073. The cubic root of 20554200 is about 273.9261704577.

Adding to 20554200 its reverse (245502), we get a palindrome (20799702).

The spelling of 20554200 in words is "twenty million, five hundred fifty-four thousand, two hundred".