21030332433 has 32 divisors (see below), whose sum is σ = 31668019200. Its totient is φ = 12296961600.

The previous prime is 21030332423. The next prime is 21030332437. The reversal of 21030332433 is 33423303012.

It is a happy number.

It is not a de Polignac number, because 21030332433 - 2⁶ = 21030332369 is a prime.

It is a super-4 number, since 4×21030332433⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (21030332437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1400278 + ... + 1415216.

It is an arithmetic number, because the mean of its divisors is an integer number (989625600).

Almost surely, 2^21030332433 is an apocalyptic number.

It is an amenable number.

21030332433 is a deficient number, since it is larger than the sum of its proper divisors (10637686767).

21030332433 is a wasteful number, since it uses less digits than its factorization.

21030332433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16453.

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

Adding to 21030332433 its reverse (33423303012), we get a palindrome (54453635445).

The spelling of 21030332433 in words is "twenty-one billion, thirty million, three hundred thirty-two thousand, four hundred thirty-three".