21033402052 has 24 divisors (see below), whose sum is σ = 39660590592. Its totient is φ = 9702650400.

The previous prime is 21033402041. The next prime is 21033402073. The reversal of 21033402052 is 25020433012.

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 7 ways as a sum of consecutive naturals, for example, 4324 + ... + 205147.

It is an arithmetic number, because the mean of its divisors is an integer number (1652524608).

Almost surely, 2^21033402052 is an apocalyptic number.

It is an amenable number.

21033402052 is a deficient number, since it is larger than the sum of its proper divisors (18627188540).

21033402052 is a wasteful number, since it uses less digits than its factorization.

21033402052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211419 (or 211417 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 21033402052 its reverse (25020433012), we get a palindrome (46053835064).

The spelling of 21033402052 in words is "twenty-one billion, thirty-three million, four hundred two thousand, fifty-two".