21628000485 has 512 divisors, whose sum is σ = 53329920000. Its totient is φ = 8230118400.

The previous prime is 21628000463. The next prime is 21628000489. The reversal of 21628000485 is 58400082612.

21628000485 is a `hidden beast` number, since 21 + 628 + 0 + 0 + 0 + 4 + 8 + 5 = 666.

It is not a de Polignac number, because 21628000485 - 2⁵ = 21628000453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21628000489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 354557355 + ... + 354557415.

It is an arithmetic number, because the mean of its divisors is an integer number (104160000).

Almost surely, 2^21628000485 is an apocalyptic number.

It is an amenable number.

21628000485 is an abundant number, since it is smaller than the sum of its proper divisors (31701919515).

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

21628000485 is a wasteful number, since it uses less digits than its factorization.

21628000485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 21628000485 in words is "twenty-one billion, six hundred twenty-eight million, four hundred eighty-five", and thus it is an aban number.