21352023224 has 96 divisors (see below), whose sum is σ = 49080556800. Its totient is φ = 8658982080.

The previous prime is 21352023211. The next prime is 21352023229. The reversal of 21352023224 is 42232025312.

It is a junction number, because it is equal to n+sod(n) for n = 21352023193 and 21352023202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352023229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11789279 + ... + 11791089.

It is an arithmetic number, because the mean of its divisors is an integer number (511255800).

Almost surely, 2^21352023224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21352023224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24540278400).

21352023224 is an abundant number, since it is smaller than the sum of its proper divisors (27728533576).

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

21352023224 is a wasteful number, since it uses less digits than its factorization.

21352023224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433 (or 3422 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21352023224 its reverse (42232025312), we get a palindrome (63584048536).

The spelling of 21352023224 in words is "twenty-one billion, three hundred fifty-two million, twenty-three thousand, two hundred twenty-four".