21532000232 has 16 divisors (see below), whose sum is σ = 40374592800. Its totient is φ = 10765442160.

The previous prime is 21532000223. The next prime is 21532000253. The reversal of 21532000232 is 23200023512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126869 + ... + 243227.

It is an arithmetic number, because the mean of its divisors is an integer number (2523412050).

Almost surely, 2^21532000232 is an apocalyptic number.

It is an amenable number.

21532000232 is a deficient number, since it is larger than the sum of its proper divisors (18842592568).

21532000232 is a wasteful number, since it uses less digits than its factorization.

21532000232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139496 (or 139492 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 21532000232 its reverse (23200023512), we get a palindrome (44732023744).

The spelling of 21532000232 in words is "twenty-one billion, five hundred thirty-two million, two hundred thirty-two", and thus it is an aban number.