21088466517228 has 96 divisors (see below), whose sum is σ = 53946874920960. Its totient is φ = 6358718744640.

The previous prime is 21088466517187. The next prime is 21088466517241. The reversal of 21088466517228 is 82271566488012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21459525 + ... + 22420707.

It is an arithmetic number, because the mean of its divisors is an integer number (561946613760).

Almost surely, 2^{21088466517228} is an apocalyptic number.

It is an amenable number.

21088466517228 is an abundant number, since it is smaller than the sum of its proper divisors (32858408403732).

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

21088466517228 is a wasteful number, since it uses less digits than its factorization.

21088466517228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962027 (or 962025 counting only the distinct ones).

The product of its (nonzero) digits is 20643840, while the sum is 60.

The spelling of 21088466517228 in words is "twenty-one trillion, eighty-eight billion, four hundred sixty-six million, five hundred seventeen thousand, two hundred twenty-eight".