20011505226528 has 24 divisors (see below), whose sum is σ = 52530201219888. Its totient is φ = 6670501742144.

The previous prime is 20011505226499. The next prime is 20011505226541. The reversal of 20011505226528 is 82562250511002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

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, 104226589626 + ... + 104226589817.

It is an arithmetic number, because the mean of its divisors is an integer number (2188758384162).

Almost surely, 2^{20011505226528} is an apocalyptic number.

It is an amenable number.

20011505226528 is an abundant number, since it is smaller than the sum of its proper divisors (32518695993360).

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

20011505226528 is a wasteful number, since it uses less digits than its factorization.

20011505226528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208453179456 (or 208453179448 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 39.

The spelling of 20011505226528 in words is "twenty trillion, eleven billion, five hundred five million, two hundred twenty-six thousand, five hundred twenty-eight".