20630450 has 12 divisors (see below), whose sum is σ = 38372730. Its totient is φ = 8252160.

The previous prime is 20630413. The next prime is 20630453. The reversal of 20630450 is 5403602.

It can be written as a sum of positive squares in 3 ways, for example, as 18156121 + 2474329 = 4261^2 + 1573^2 .

It is not an unprimeable number, because it can be changed into a prime (20630453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206255 + ... + 206354.

Almost surely, 2^20630450 is an apocalyptic number.

20630450 is a deficient number, since it is larger than the sum of its proper divisors (17742280).

20630450 is a wasteful number, since it uses less digits than its factorization.

20630450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412621 (or 412616 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20630450 is about 4542.0755167654. The cubic root of 20630450 is about 274.2644808040.

The spelling of 20630450 in words is "twenty million, six hundred thirty thousand, four hundred fifty".