21230443232 has 24 divisors (see below), whose sum is σ = 41804683200. Its totient is φ = 10613380864.

The previous prime is 21230443153. The next prime is 21230443271. The reversal of 21230443232 is 23234403212.

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 3 ways as a sum of consecutive naturals, for example, 140369 + ... + 249327.

It is an arithmetic number, because the mean of its divisors is an integer number (1741861800).

Almost surely, 2^21230443232 is an apocalyptic number.

It is an amenable number.

21230443232 is a deficient number, since it is larger than the sum of its proper divisors (20574239968).

21230443232 is a wasteful number, since it uses less digits than its factorization.

21230443232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115058 (or 115050 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21230443232 its reverse (23234403212), we get a palindrome (44464846444).

The spelling of 21230443232 in words is "twenty-one billion, two hundred thirty million, four hundred forty-three thousand, two hundred thirty-two".