21242323000 has 160 divisors (see below), whose sum is σ = 52790409360. Its totient is φ = 8000337600.

The previous prime is 21242322977. The next prime is 21242323001. The reversal of 21242323000 is 32324212.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242323001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 130320919 + ... + 130321081.

Almost surely, 2^21242323000 is an apocalyptic number.

21242323000 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 21242323000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26395204680).

21242323000 is an abundant number, since it is smaller than the sum of its proper divisors (31548086360).

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

21242323000 is an frugal number, since it uses more digits than its factorization.

21242323000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21242323000 its reverse (32324212), we get a palindrome (21274647212).

The spelling of 21242323000 in words is "twenty-one billion, two hundred forty-two million, three hundred twenty-three thousand".