20484504580 has 72 divisors (see below), whose sum is σ = 45949038912. Its totient is φ = 7668800064.

The previous prime is 20484504563. The next prime is 20484504589. The reversal of 20484504580 is 8540548402.

It is a happy number.

It is a super-2 number, since 2×20484504580² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20484504589) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 582169 + ... + 616351.

It is an arithmetic number, because the mean of its divisors is an integer number (638181096).

Almost surely, 2^20484504580 is an apocalyptic number.

20484504580 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 20484504580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22974519456).

20484504580 is an abundant number, since it is smaller than the sum of its proper divisors (25464534332).

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

20484504580 is a wasteful number, since it uses less digits than its factorization.

20484504580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34313 (or 34292 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 40.

The spelling of 20484504580 in words is "twenty billion, four hundred eighty-four million, five hundred four thousand, five hundred eighty".