21023232000 has 208 divisors, whose sum is σ = 69961886592. Its totient is φ = 5605785600.

The previous prime is 21023231897. The next prime is 21023232011. The reversal of 21023232000 is 23232012.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1529157 + ... + 1542843.

It is an arithmetic number, because the mean of its divisors is an integer number (336355224).

Almost surely, 2^21023232000 is an apocalyptic number.

21023232000 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 21023232000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34980943296).

21023232000 is an abundant number, since it is smaller than the sum of its proper divisors (48938654592).

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

21023232000 is an equidigital number, since it uses as much as digits as its factorization.

21023232000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13729 (or 13697 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21023232000 its reverse (23232012), we get a palindrome (21046464012).

The spelling of 21023232000 in words is "twenty-one billion, twenty-three million, two hundred thirty-two thousand".