21033432052 has 24 divisors (see below), whose sum is σ = 37498773312. Its totient is φ = 10321176000.

The previous prime is 21033432001. The next prime is 21033432059. The reversal of 21033432052 is 25023433012.

It is a super-2 number, since 2×21033432052² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033432059) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 159649 + ... + 259912.

It is an arithmetic number, because the mean of its divisors is an integer number (1562448888).

Almost surely, 2^21033432052 is an apocalyptic number.

It is an amenable number.

21033432052 is a deficient number, since it is larger than the sum of its proper divisors (16465341260).

21033432052 is a wasteful number, since it uses less digits than its factorization.

21033432052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419799 (or 419797 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21033432052 its reverse (25023433012), we get a palindrome (46056865064).

The spelling of 21033432052 in words is "twenty-one billion, thirty-three million, four hundred thirty-two thousand, fifty-two".