21425524000 has 96 divisors (see below), whose sum is σ = 53867189376. Its totient is φ = 8370835200.

The previous prime is 21425523989. The next prime is 21425524049. The reversal of 21425524000 is 42552412.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109717 + ... + 234283.

It is an arithmetic number, because the mean of its divisors is an integer number (561116556).

Almost surely, 2^21425524000 is an apocalyptic number.

21425524000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21425524000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26933594688).

21425524000 is an abundant number, since it is smaller than the sum of its proper divisors (32441665376).

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

21425524000 is a wasteful number, since it uses less digits than its factorization.

21425524000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124635 (or 124617 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The spelling of 21425524000 in words is "twenty-one billion, four hundred twenty-five million, five hundred twenty-four thousand".