21422124000 has 384 divisors, whose sum is σ = 78592550400. Its totient is φ = 5667494400.

The previous prime is 21422123981. The next prime is 21422124001. The reversal of 21422124000 is 42122412.

21422124000 is a `hidden beast` number, since 2 + 1 + 422 + 1 + 240 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422124001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15011287 + ... + 15012713.

It is an arithmetic number, because the mean of its divisors is an integer number (204668100).

Almost surely, 2^21422124000 is an apocalyptic number.

21422124000 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 21422124000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39296275200).

21422124000 is an abundant number, since it is smaller than the sum of its proper divisors (57170426400).

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

21422124000 is a wasteful number, since it uses less digits than its factorization.

21422124000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1576 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21422124000 its reverse (42122412), we get a palindrome (21464246412).

The spelling of 21422124000 in words is "twenty-one billion, four hundred twenty-two million, one hundred twenty-four thousand".