20887227520 has 32 divisors (see below), whose sum is σ = 49933529820. Its totient is φ = 8354890752.

The previous prime is 20887227503. The next prime is 20887227527. The reversal of 20887227520 is 2572278802.

It can be written as a sum of positive squares in 2 ways, for example, as 20188999744 + 698227776 = 142088^2 + 26424^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (20887227527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16317507 + ... + 16318786.

Almost surely, 2^20887227520 is an apocalyptic number.

20887227520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20887227520 is an abundant number, since it is smaller than the sum of its proper divisors (29046302300).

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

20887227520 is an equidigital number, since it uses as much as digits as its factorization.

20887227520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32636312 (or 32636300 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The spelling of 20887227520 in words is "twenty billion, eight hundred eighty-seven million, two hundred twenty-seven thousand, five hundred twenty".