20808480030 has 64 divisors (see below), whose sum is σ = 54007188480. Its totient is φ = 5100633216.

The previous prime is 20808480013. The next prime is 20808480031. The reversal of 20808480030 is 3008480802.

It is a junction number, because it is equal to n+sod(n) for n = 20808479973 and 20808480000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20808480031) 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, 18412 + ... + 204831.

It is an arithmetic number, because the mean of its divisors is an integer number (843862320).

Almost surely, 2^20808480030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20808480030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27003594240).

20808480030 is an abundant number, since it is smaller than the sum of its proper divisors (33198708450).

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

20808480030 is a wasteful number, since it uses less digits than its factorization.

20808480030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223505.

The product of its (nonzero) digits is 12288, while the sum is 33.

The spelling of 20808480030 in words is "twenty billion, eight hundred eight million, four hundred eighty thousand, thirty".