21033033030 has 24 divisors (see below), whose sum is σ = 54685886112. Its totient is φ = 5608808784.

The previous prime is 21033033017. The next prime is 21033033083. The reversal of 21033033030 is 3033033012.

21033033030 is a `hidden beast` number, since 2 + 1 + 0 + 330 + 330 + 3 + 0 = 666.

21033033030 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 21033032994 and 21033033012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116850094 + ... + 116850273.

It is an arithmetic number, because the mean of its divisors is an integer number (2278578588).

Almost surely, 2^21033033030 is an apocalyptic number.

21033033030 is an abundant number, since it is smaller than the sum of its proper divisors (33652853082).

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

21033033030 is a wasteful number, since it uses less digits than its factorization.

21033033030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233700380 (or 233700377 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 18.

Subtracting from 21033033030 its sum of digits (18), we obtain a palindrome (21033033012).

Adding to 21033033030 its reverse (3033033012), we get a palindrome (24066066042).

The spelling of 21033033030 in words is "twenty-one billion, thirty-three million, thirty-three thousand, thirty".