21030433332 has 12 divisors (see below), whose sum is σ = 49071011136. Its totient is φ = 7010144440.

The previous prime is 21030433331. The next prime is 21030433397. The reversal of 21030433332 is 23333403012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21030433332² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030433331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876268044 + ... + 876268067.

It is an arithmetic number, because the mean of its divisors is an integer number (4089250928).

Almost surely, 2^21030433332 is an apocalyptic number.

It is an amenable number.

21030433332 is an abundant number, since it is smaller than the sum of its proper divisors (28040577804).

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

21030433332 is a wasteful number, since it uses less digits than its factorization.

21030433332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752536118 (or 1752536116 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21030433332 its reverse (23333403012), we get a palindrome (44363836344).

The spelling of 21030433332 in words is "twenty-one billion, thirty million, four hundred thirty-three thousand, three hundred thirty-two".