21010528000044 has 144 divisors (see below), whose sum is σ = 58624702456320. Its totient is φ = 6291785136000.

The previous prime is 21010528000043. The next prime is 21010528000057. The reversal of 21010528000044 is 44000082501012.

It is a junction number, because it is equal to n+sod(n) for n = 21010527999981 and 21010528000017.

It is not an unprimeable number, because it can be changed into a prime (21010528000043) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11551054 + ... + 13245674.

It is an arithmetic number, because the mean of its divisors is an integer number (407115989280).

Almost surely, 2^{21010528000044} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21010528000044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29312351228160).

21010528000044 is an abundant number, since it is smaller than the sum of its proper divisors (37614174456276).

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

21010528000044 is a wasteful number, since it uses less digits than its factorization.

21010528000044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695012 (or 1695007 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The spelling of 21010528000044 in words is "twenty-one trillion, ten billion, five hundred twenty-eight million, forty-four", and thus it is an aban number.