21033320032 has 24 divisors (see below), whose sum is σ = 41426249256. Its totient is φ = 10512367872.

The previous prime is 21033319981. The next prime is 21033320059. The reversal of 21033320032 is 23002333012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21033319991 and 21033320009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53758 + ... + 212029.

It is an arithmetic number, because the mean of its divisors is an integer number (1726093719).

Almost surely, 2^21033320032 is an apocalyptic number.

It is an amenable number.

21033320032 is a deficient number, since it is larger than the sum of its proper divisors (20392929224).

21033320032 is a wasteful number, since it uses less digits than its factorization.

21033320032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268270 (or 268262 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21033320032 its reverse (23002333012), we get a palindrome (44035653044).

The spelling of 21033320032 in words is "twenty-one billion, thirty-three million, three hundred twenty thousand, thirty-two".