20532455240 has 64 divisors (see below), whose sum is σ = 50435136000. Its totient is φ = 7460823040.

The previous prime is 20532455239. The next prime is 20532455243. The reversal of 20532455240 is 4255423502.

It is a junction number, because it is equal to n+sod(n) for n = 20532455197 and 20532455206.

It is not an unprimeable number, because it can be changed into a prime (20532455243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603401 + ... + 636519.

It is an arithmetic number, because the mean of its divisors is an integer number (788049000).

Almost surely, 2^20532455240 is an apocalyptic number.

20532455240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20532455240 is an abundant number, since it is smaller than the sum of its proper divisors (29902680760).

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

20532455240 is a wasteful number, since it uses less digits than its factorization.

20532455240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34550 (or 34546 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 32.

Adding to 20532455240 its reverse (4255423502), we get a palindrome (24787878742).

The spelling of 20532455240 in words is "twenty billion, five hundred thirty-two million, four hundred fifty-five thousand, two hundred forty".