20115550532 has 96 divisors (see below), whose sum is σ = 44394206976. Its totient is φ = 7747430400.

The previous prime is 20115550531. The next prime is 20115550547. The reversal of 20115550532 is 23505551102.

It is a junction number, because it is equal to n+sod(n) for n = 20115550495 and 20115550504.

It is not an unprimeable number, because it can be changed into a prime (20115550531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11687432 + ... + 11689152.

It is an arithmetic number, because the mean of its divisors is an integer number (462439656).

Almost surely, 2^20115550532 is an apocalyptic number.

20115550532 is a gapful number since it is divisible by the number (22) 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 20115550532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22197103488).

20115550532 is an abundant number, since it is smaller than the sum of its proper divisors (24278656444).

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

20115550532 is a wasteful number, since it uses less digits than its factorization.

20115550532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157 (or 2155 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 20115550532 in words is "twenty billion, one hundred fifteen million, five hundred fifty thousand, five hundred thirty-two".