20533450 has 108 divisors (see below), whose sum is σ = 48822210. Its totient is φ = 6397440.

The previous prime is 20533427. The next prime is 20533451. The reversal of 20533450 is 5433502.

It can be written as a sum of positive squares in 9 ways, for example, as 5764801 + 14768649 = 2401^2 + 3843^2 .

It is not an unprimeable number, because it can be changed into a prime (20533451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 708036 + ... + 708064.

Almost surely, 2^20533450 is an apocalyptic number.

20533450 is an abundant number, since it is smaller than the sum of its proper divisors (28288760).

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

20533450 is a wasteful number, since it uses less digits than its factorization.

20533450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 20533450 is about 4531.3849979890. The cubic root of 20533450 is about 273.8339608879.

Adding to 20533450 its reverse (5433502), we get a palindrome (25966952).

The spelling of 20533450 in words is "twenty million, five hundred thirty-three thousand, four hundred fifty".