20661050 has 24 divisors (see below), whose sum is σ = 39757500. Its totient is φ = 7978880.

The previous prime is 20661049. The next prime is 20661101. The reversal of 20661050 is 5016602.

It can be written as a sum of positive squares in 6 ways, for example, as 10156969 + 10504081 = 3187^2 + 3241^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5675 + ... + 8574.

Almost surely, 2^20661050 is an apocalyptic number.

20661050 is a deficient number, since it is larger than the sum of its proper divisors (19096450).

20661050 is a wasteful number, since it uses less digits than its factorization.

20661050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14290 (or 14285 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20661050 is about 4545.4427727120. The cubic root of 20661050 is about 274.4000142373.

Adding to 20661050 its reverse (5016602), we get a palindrome (25677652).

The spelling of 20661050 in words is "twenty million, six hundred sixty-one thousand, fifty".