20641030 has 16 divisors (see below), whose sum is σ = 39109680. Its totient is φ = 7821792.

The previous prime is 20641013. The next prime is 20641039. The reversal of 20641030 is 3014602.

It is a junction number, because it is equal to n+sod(n) for n = 20640995 and 20641013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641039) 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 7 ways as a sum of consecutive naturals, for example, 54129 + ... + 54508.

It is an arithmetic number, because the mean of its divisors is an integer number (2444355).

Almost surely, 2^20641030 is an apocalyptic number.

20641030 is a deficient number, since it is larger than the sum of its proper divisors (18468650).

20641030 is a wasteful number, since it uses less digits than its factorization.

20641030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108663.

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

The square root of 20641030 is about 4543.2400332802. The cubic root of 20641030 is about 274.3113568588.

Adding to 20641030 its reverse (3014602), we get a palindrome (23655632).

The spelling of 20641030 in words is "twenty million, six hundred forty-one thousand, thirty".