20244000 has 192 divisors, whose sum is σ = 76108032. Its totient is φ = 4608000.

The previous prime is 20243989. The next prime is 20244041. The reversal of 20244000 is 44202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83880 + ... + 84120.

It is an arithmetic number, because the mean of its divisors is an integer number (396396).

Almost surely, 2^20244000 is an apocalyptic number.

20244000 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 20244000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38054016).

20244000 is an abundant number, since it is smaller than the sum of its proper divisors (55864032).

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

20244000 is a wasteful number, since it uses less digits than its factorization.

20244000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 20244000 is about 4499.3332839433. Note that the first 3 decimals coincide. The cubic root of 20244000 is about 272.5411659605.

Adding to 20244000 its reverse (44202), we get a palindrome (20288202).

The spelling of 20244000 in words is "twenty million, two hundred forty-four thousand".