20605548020 has 96 divisors (see below), whose sum is σ = 46347088032. Its totient is φ = 7668154368.

The previous prime is 20605547999. The next prime is 20605548059. The reversal of 20605548020 is 2084550602.

It can be written as a sum of positive squares in 16 ways, for example, as 6786134884 + 13819413136 = 82378^2 + 117556^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12901862 + ... + 12903458.

It is an arithmetic number, because the mean of its divisors is an integer number (482782167).

Almost surely, 2^20605548020 is an apocalyptic number.

20605548020 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 20605548020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23173544016).

20605548020 is an abundant number, since it is smaller than the sum of its proper divisors (25741540012).

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

20605548020 is a wasteful number, since it uses less digits than its factorization.

20605548020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037 (or 2035 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 20605548020 in words is "twenty billion, six hundred five million, five hundred forty-eight thousand, twenty".