20533450240 has 120 divisors (see below), whose sum is σ = 50315788512. Its totient is φ = 8036413440.

The previous prime is 20533450213. The next prime is 20533450339. The reversal of 20533450240 is 4205433502.

It is a junction number, because it is equal to n+sod(n) for n = 20533450199 and 20533450208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5653225 + ... + 5656855.

Almost surely, 2^20533450240 is an apocalyptic number.

20533450240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20533450240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25157894256).

20533450240 is an abundant number, since it is smaller than the sum of its proper divisors (29782338272).

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

20533450240 is an frugal number, since it uses more digits than its factorization.

20533450240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748 (or 3685 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 28.

Adding to 20533450240 its reverse (4205433502), we get a palindrome (24738883742).

The spelling of 20533450240 in words is "twenty billion, five hundred thirty-three million, four hundred fifty thousand, two hundred forty".