21533223032 has 16 divisors (see below), whose sum is σ = 42499782600. Its totient is φ = 10199947680.

The previous prime is 21533223029. The next prime is 21533223071. The reversal of 21533223032 is 23032233512.

It is a junction number, because it is equal to n+sod(n) for n = 21533222992 and 21533223010.

It is a congruent number.

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, 70832819 + ... + 70833122.

Almost surely, 2^21533223032 is an apocalyptic number.

It is an amenable number.

21533223032 is a deficient number, since it is larger than the sum of its proper divisors (20966559568).

21533223032 is a wasteful number, since it uses less digits than its factorization.

21533223032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141665966 (or 141665962 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 21533223032 its reverse (23032233512), we get a palindrome (44565456544).

The spelling of 21533223032 in words is "twenty-one billion, five hundred thirty-three million, two hundred twenty-three thousand, thirty-two".