21825003228 has 24 divisors (see below), whose sum is σ = 58200008832. Its totient is φ = 6235715184.

The previous prime is 21825003169. The next prime is 21825003269. The reversal of 21825003228 is 82230052812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129910650 + ... + 129910817.

It is an arithmetic number, because the mean of its divisors is an integer number (2425000368).

Almost surely, 2^21825003228 is an apocalyptic number.

21825003228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21825003228 is an abundant number, since it is smaller than the sum of its proper divisors (36375005604).

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

21825003228 is a wasteful number, since it uses less digits than its factorization.

21825003228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259821481 (or 259821479 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 21825003228 in words is "twenty-one billion, eight hundred twenty-five million, three thousand, two hundred twenty-eight".