21033032403 has 16 divisors (see below), whose sum is σ = 28490247936. Its totient is φ = 13799630880.

The previous prime is 21033032399. The next prime is 21033032411. The reversal of 21033032403 is 30423033012.

It is not a de Polignac number, because 21033032403 - 2² = 21033032399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21033032403.

It is not an unprimeable number, because it can be changed into a prime (21033032453) 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 15 ways as a sum of consecutive naturals, for example, 30000 + ... + 207282.

It is an arithmetic number, because the mean of its divisors is an integer number (1780640496).

Almost surely, 2^21033032403 is an apocalyptic number.

21033032403 is a deficient number, since it is larger than the sum of its proper divisors (7457215533).

21033032403 is a wasteful number, since it uses less digits than its factorization.

21033032403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177914.

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

Adding to 21033032403 its reverse (30423033012), we get a palindrome (51456065415).

The spelling of 21033032403 in words is "twenty-one billion, thirty-three million, thirty-two thousand, four hundred three".