20552040520 has 128 divisors (see below), whose sum is σ = 53482083840. Its totient is φ = 7024803840.

The previous prime is 20552040511. The next prime is 20552040629. The reversal of 20552040520 is 2504025502.

It is a happy 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, 8623249 + ... + 8625631.

It is an arithmetic number, because the mean of its divisors is an integer number (417828780).

Almost surely, 2^20552040520 is an apocalyptic number.

20552040520 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 20552040520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26741041920).

20552040520 is an abundant number, since it is smaller than the sum of its proper divisors (32930043320).

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

20552040520 is a wasteful number, since it uses less digits than its factorization.

20552040520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575 (or 3571 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The spelling of 20552040520 in words is "twenty billion, five hundred fifty-two million, forty thousand, five hundred twenty".