20641050 has 36 divisors (see below), whose sum is σ = 55456830. Its totient is φ = 5504160.

The previous prime is 20641039. The next prime is 20641057. The reversal of 20641050 is 5014602.

It is a happy number.

20641050 is a `hidden beast` number, since 20 + 641 + 0 + 5 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 16966161 + 3674889 = 4119^2 + 1917^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20641057) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22485 + ... + 23384.

Almost surely, 2^20641050 is an apocalyptic number.

20641050 is an abundant number, since it is smaller than the sum of its proper divisors (34815780).

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

20641050 is a wasteful number, since it uses less digits than its factorization.

20641050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45887 (or 45879 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20641050 is about 4543.2422343520. The cubic root of 20641050 is about 274.3114454562.

Adding to 20641050 its reverse (5014602), we get a palindrome (25655652).

The spelling of 20641050 in words is "twenty million, six hundred forty-one thousand, fifty".