20450316 has 24 divisors (see below), whose sum is σ = 48212080. Its totient is φ = 6746112.

The previous prime is 20450299. The next prime is 20450317. The reversal of 20450316 is 61305402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20450292 and 20450301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7621 + ... + 9948.

Almost surely, 2^20450316 is an apocalyptic number.

It is an amenable number.

20450316 is an abundant number, since it is smaller than the sum of its proper divisors (27761764).

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

20450316 is a wasteful number, since it uses less digits than its factorization.

20450316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17673 (or 17671 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20450316 is about 4522.2025606998. The cubic root of 20450316 is about 273.4639028502.

Adding to 20450316 its reverse (61305402), we get a palindrome (81755718).

The spelling of 20450316 in words is "twenty million, four hundred fifty thousand, three hundred sixteen".