21235032000 has 1008 divisors, whose sum is σ = 95365775232. Its totient is φ = 4470681600.

The previous prime is 21235031999. The next prime is 21235032043. The reversal of 21235032000 is 23053212.

It is a tau number, because it is divible by the number of its divisors (1008).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 45863769 + ... + 45864231.

It is an arithmetic number, because the mean of its divisors is an integer number (94608904).

Almost surely, 2^21235032000 is an apocalyptic number.

21235032000 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 21235032000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47682887616).

21235032000 is an abundant number, since it is smaller than the sum of its proper divisors (74130743232).

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

21235032000 is a wasteful number, since it uses less digits than its factorization.

21235032000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

Adding to 21235032000 its reverse (23053212), we get a palindrome (21258085212).

The spelling of 21235032000 in words is "twenty-one billion, two hundred thirty-five million, thirty-two thousand".