21323223223232 has 56 divisors (see below), whose sum is σ = 48360403054464. Its totient is φ = 9138074671872.

The previous prime is 21323223223231. The next prime is 21323223223243. The reversal of 21323223223232 is 23232232232312.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323223223231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8026643 + ... + 10347629.

Almost surely, 2^{21323223223232} is an apocalyptic number.

It is an amenable number.

21323223223232 is an abundant number, since it is smaller than the sum of its proper divisors (27037179831232).

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

21323223223232 is a wasteful number, since it uses less digits than its factorization.

21323223223232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341513 (or 2341503 counting only the distinct ones).

The product of its digits is 62208, while the sum is 32.

Adding to 21323223223232 its reverse (23232232232312), we get a palindrome (44555455455544).

The spelling of 21323223223232 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred twenty-three million, two hundred twenty-three thousand, two hundred thirty-two".