20530450 has 24 divisors (see below), whose sum is σ = 40198320. Its totient is φ = 7779600.

The previous prime is 20530427. The next prime is 20530453. The reversal of 20530450 is 5403502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (20530453) 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, 9856 + ... + 11755.

It is an arithmetic number, because the mean of its divisors is an integer number (1674930).

Almost surely, 2^20530450 is an apocalyptic number.

20530450 is a deficient number, since it is larger than the sum of its proper divisors (19667870).

20530450 is a wasteful number, since it uses less digits than its factorization.

20530450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21642 (or 21637 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20530450 is about 4531.0539612766. The cubic root of 20530450 is about 273.8206242447.

Adding to 20530450 its reverse (5403502), we get a palindrome (25933952).

The spelling of 20530450 in words is "twenty million, five hundred thirty thousand, four hundred fifty".