21225084000 has 96 divisors (see below), whose sum is σ = 69533414496. Its totient is φ = 5660019200.

The previous prime is 21225083987. The next prime is 21225084073. The reversal of 21225084000 is 48052212.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 872379 + ... + 896378.

It is an arithmetic number, because the mean of its divisors is an integer number (724306401).

Almost surely, 2^21225084000 is an apocalyptic number.

21225084000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21225084000 is an abundant number, since it is smaller than the sum of its proper divisors (48308330496).

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

21225084000 is a wasteful number, since it uses less digits than its factorization.

21225084000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768785 (or 1768767 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The spelling of 21225084000 in words is "twenty-one billion, two hundred twenty-five million, eighty-four thousand".