21023233441 has 16 divisors (see below), whose sum is σ = 24465226240. Its totient is φ = 17693432640.

The previous prime is 21023233391. The next prime is 21023233459. The reversal of 21023233441 is 14433232012.

It is a cyclic number.

It is not a de Polignac number, because 21023233441 - 2⁷ = 21023233313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21023233471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4926 + ... + 205111.

It is an arithmetic number, because the mean of its divisors is an integer number (1529076640).

Almost surely, 2^21023233441 is an apocalyptic number.

It is an amenable number.

21023233441 is a deficient number, since it is larger than the sum of its proper divisors (3441992799).

21023233441 is a wasteful number, since it uses less digits than its factorization.

21023233441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210304.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21023233441 its reverse (14433232012), we get a palindrome (35456465453).

The spelling of 21023233441 in words is "twenty-one billion, twenty-three million, two hundred thirty-three thousand, four hundred forty-one".