20650050 has 72 divisors (see below), whose sum is σ = 56121780. Its totient is φ = 5443200.

The previous prime is 20650043. The next prime is 20650057. The reversal of 20650050 is 5005602.

It is an interprime number because it is at equal distance from previous prime (20650043) and next prime (20650057).

It can be written as a sum of positive squares in 6 ways, for example, as 2934369 + 17715681 = 1713^2 + 4209^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20650057) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 48840 + ... + 49260.

Almost surely, 2^20650050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20650050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28060890).

20650050 is an abundant number, since it is smaller than the sum of its proper divisors (35471730).

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

20650050 is a wasteful number, since it uses less digits than its factorization.

20650050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20650050 is about 4544.2326084830. The cubic root of 20650050 is about 274.3513084844.

Adding to 20650050 its reverse (5005602), we get a palindrome (25655652).

The spelling of 20650050 in words is "twenty million, six hundred fifty thousand, fifty".