21020432233 has 8 divisors (see below), whose sum is σ = 21470249088. Its totient is φ = 20570722704.

The previous prime is 21020432231. The next prime is 21020432269. The reversal of 21020432233 is 33223402012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21020432233 - 2¹ = 21020432231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020432231) 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, 464010 + ... + 507292.

It is an arithmetic number, because the mean of its divisors is an integer number (2683781136).

Almost surely, 2^21020432233 is an apocalyptic number.

It is an amenable number.

21020432233 is a deficient number, since it is larger than the sum of its proper divisors (449816855).

21020432233 is a wasteful number, since it uses less digits than its factorization.

21020432233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53663.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21020432233 its reverse (33223402012), we get a palindrome (54243834245).

The spelling of 21020432233 in words is "twenty-one billion, twenty million, four hundred thirty-two thousand, two hundred thirty-three".