20118650 has 24 divisors (see below), whose sum is σ = 39623580. Its totient is φ = 7573760.

The previous prime is 20118643. The next prime is 20118653. The reversal of 20118650 is 5681102.

It can be written as a sum of positive squares in 6 ways, for example, as 8579041 + 11539609 = 2929^2 + 3397^2 .

It is not an unprimeable number, because it can be changed into a prime (20118653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10985 + ... + 12684.

Almost surely, 2^20118650 is an apocalyptic number.

20118650 is a deficient number, since it is larger than the sum of its proper divisors (19504930).

20118650 is a wasteful number, since it uses less digits than its factorization.

20118650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23698 (or 23693 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 20118650 is about 4485.3818120646. The cubic root of 20118650 is about 271.9774797531.

Adding to 20118650 its reverse (5681102), we get a palindrome (25799752).

The spelling of 20118650 in words is "twenty million, one hundred eighteen thousand, six hundred fifty".