21210330232 has 32 divisors (see below), whose sum is σ = 48946917600. Its totient is φ = 8390899584.

The previous prime is 21210330227. The next prime is 21210330259. The reversal of 21210330232 is 23203301212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14566807 + ... + 14568262.

It is an arithmetic number, because the mean of its divisors is an integer number (1529591175).

Almost surely, 2^21210330232 is an apocalyptic number.

It is an amenable number.

21210330232 is an abundant number, since it is smaller than the sum of its proper divisors (27736587368).

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

21210330232 is a wasteful number, since it uses less digits than its factorization.

21210330232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29135095 (or 29135091 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21210330232 its reverse (23203301212), we get a palindrome (44413631444).

The spelling of 21210330232 in words is "twenty-one billion, two hundred ten million, three hundred thirty thousand, two hundred thirty-two".