21033232032 has 48 divisors (see below), whose sum is σ = 55255792032. Its totient is φ = 7005546240.

The previous prime is 21033232021. The next prime is 21033232037. The reversal of 21033232032 is 23023233012.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (21033232037) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 36807 + ... + 208377.

It is an arithmetic number, because the mean of its divisors is an integer number (1151162334).

Almost surely, 2^21033232032 is an apocalyptic number.

It is an amenable number.

21033232032 is an abundant number, since it is smaller than the sum of its proper divisors (34222560000).

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

21033232032 is a wasteful number, since it uses less digits than its factorization.

21033232032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172861 (or 172853 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21033232032 its reverse (23023233012), we get a palindrome (44056465044).

The spelling of 21033232032 in words is "twenty-one billion, thirty-three million, two hundred thirty-two thousand, thirty-two".