21023200332 has 108 divisors (see below), whose sum is σ = 56204464680. Its totient is φ = 6624906624.

The previous prime is 21023200291. The next prime is 21023200441. The reversal of 21023200332 is 23300232012.

It is a happy number.

21023200332 is a `hidden beast` number, since 2 + 10 + 2 + 320 + 0 + 332 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7393303 + ... + 7396145.

It is an arithmetic number, because the mean of its divisors is an integer number (520411710).

Almost surely, 2^21023200332 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 21023200332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28102232340).

21023200332 is an abundant number, since it is smaller than the sum of its proper divisors (35181264348).

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

21023200332 is a wasteful number, since it uses less digits than its factorization.

21023200332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460 (or 3436 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21023200332 its reverse (23300232012), we get a palindrome (44323432344).

The spelling of 21023200332 in words is "twenty-one billion, twenty-three million, two hundred thousand, three hundred thirty-two".