20245000 has 40 divisors (see below), whose sum is σ = 47445750. Its totient is φ = 8096000.

The previous prime is 20244989. The next prime is 20245007. The reversal of 20245000 is 54202.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 12996 + 20232004 = 114^2 + 4498^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (20245007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2976 + ... + 7024.

Almost surely, 2^20245000 is an apocalyptic number.

20245000 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 20245000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23722875).

20245000 is an abundant number, since it is smaller than the sum of its proper divisors (27200750).

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

20245000 is an equidigital number, since it uses as much as digits as its factorization.

20245000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075 (or 4056 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 20245000 is about 4499.4444101467. Note that the first 4 decimals coincide. The cubic root of 20245000 is about 272.5456534906.

Adding to 20245000 its reverse (54202), we get a palindrome (20299202).

The spelling of 20245000 in words is "twenty million, two hundred forty-five thousand".