21232100032 has 168 divisors, whose sum is σ = 51940846080. Its totient is φ = 8520145920.

The previous prime is 21232100011. The next prime is 21232100039. The reversal of 21232100032 is 23000123212.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 21232099979 and 21232100015.

It is not an unprimeable number, because it can be changed into a prime (21232100039) 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, 2732569 + ... + 2740327.

Almost surely, 2^21232100032 is an apocalyptic number.

21232100032 is a gapful number since it is divisible by the number (22) 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 21232100032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25970423040).

21232100032 is an abundant number, since it is smaller than the sum of its proper divisors (30708746048).

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

21232100032 is a wasteful number, since it uses less digits than its factorization.

21232100032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7831 (or 7808 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21232100032 its reverse (23000123212), we get a palindrome (44232223244).

The spelling of 21232100032 in words is "twenty-one billion, two hundred thirty-two million, one hundred thousand, thirty-two".