21133142232 has 64 divisors (see below), whose sum is σ = 54597058560. Its totient is φ = 6812400000.

The previous prime is 21133142231. The next prime is 21133142243. The reversal of 21133142232 is 23224133112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133142231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2857 + ... + 205607.

It is an arithmetic number, because the mean of its divisors is an integer number (853079040).

Almost surely, 2^21133142232 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 21133142232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27298529280).

21133142232 is an abundant number, since it is smaller than the sum of its proper divisors (33463916328).

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

21133142232 is a wasteful number, since it uses less digits than its factorization.

21133142232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202904 (or 202900 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 21133142232 its reverse (23224133112), we get a palindrome (44357275344).

The spelling of 21133142232 in words is "twenty-one billion, one hundred thirty-three million, one hundred forty-two thousand, two hundred thirty-two".