21550120482 has 64 divisors (see below), whose sum is σ = 50142758400. Its totient is φ = 6101940480.

The previous prime is 21550120399. The next prime is 21550120483. The reversal of 21550120482 is 28402105512.

It is not an unprimeable number, because it can be changed into a prime (21550120483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86869 + ... + 225047.

It is an arithmetic number, because the mean of its divisors is an integer number (783480600).

Almost surely, 2^21550120482 is an apocalyptic number.

21550120482 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21550120482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25071379200).

21550120482 is an abundant number, since it is smaller than the sum of its proper divisors (28592637918).

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

21550120482 is a wasteful number, since it uses less digits than its factorization.

21550120482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138351.

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 21550120482 its reverse (28402105512), we get a palindrome (49952225994).

The spelling of 21550120482 in words is "twenty-one billion, five hundred fifty million, one hundred twenty thousand, four hundred eighty-two".