20641300 has 18 divisors (see below), whose sum is σ = 44791838. Its totient is φ = 8256480.

The previous prime is 20641297. The next prime is 20641307. The reversal of 20641300 is 314602.

It can be written as a sum of positive squares in 3 ways, for example, as 174724 + 20466576 = 418^2 + 4524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641307) 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 5 ways as a sum of consecutive naturals, for example, 103107 + ... + 103306.

Almost surely, 2^20641300 is an apocalyptic number.

20641300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20641300 is an abundant number, since it is smaller than the sum of its proper divisors (24150538).

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

20641300 is a wasteful number, since it uses less digits than its factorization.

20641300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206427 (or 206420 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20641300 is about 4543.2697476597. The cubic root of 20641300 is about 274.3125529190.

Adding to 20641300 its reverse (314602), we get a palindrome (20955902).

It can be divided in two parts, 2064 and 1300, that added together give a square (3364 = 58²).

The spelling of 20641300 in words is "twenty million, six hundred forty-one thousand, three hundred".