21230004033 has 24 divisors (see below), whose sum is σ = 35620892736. Its totient is φ = 11932552800.

The previous prime is 21230004013. The next prime is 21230004049. The reversal of 21230004033 is 33040003212.

It is not a de Polignac number, because 21230004033 - 2¹⁸ = 21229741889 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21230003997 and 21230004015.

It is not an unprimeable number, because it can be changed into a prime (21230004013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2758323 + ... + 2766008.

It is an arithmetic number, because the mean of its divisors is an integer number (1484203864).

Almost surely, 2^21230004033 is an apocalyptic number.

It is an amenable number.

21230004033 is a deficient number, since it is larger than the sum of its proper divisors (14390888703).

21230004033 is a wasteful number, since it uses less digits than its factorization.

21230004033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5524405 (or 5524402 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21230004033 its reverse (33040003212), we get a palindrome (54270007245).

The spelling of 21230004033 in words is "twenty-one billion, two hundred thirty million, four thousand, thirty-three".